37 Coupe has again hit the nail on the head, he mentions varying quality of window seals for two different applications from two different suppliers. The fact that one supplier makes a better product for the same application tha another opens up the possibility of redundancy from the get go.
If a list of parts and manufactures were compiled it would in fact be the size of a medium size book. Think of it, thousands of parts and numerous manufacturers. To do the topic justice an author would have to research the background of each part, perhaps even going so far as to checking the actual factory that produced each part. Someone like Bob Drake (for example) would have dozens of different suppliers, each would have to be checked and the quality of parts checked, then compared to others.
This would be a daunting task, I'm not surprised Ryan is laying 'Doggo' on this one. Then, in a move that could render huge amounts of data redundant, all it would take is for the suppliers like Drake, Mac's etc. to look at the "Big Book Of Really Really Neat and High Quality Parts" and decide to improve their specifications or change suppliers. Months if not years of work made obsolete by a few suppliers reallocating resources and manufacturers.
As I said on the other post on this topic, it's a noble idea to have such a list, but when such lists are compiled subjectivity has to take a back seat to expert knowledge. The possibility is high that all the research of parts, and the compiling of data and expert opinion into a book could be all for nothing in a few months time. QED.
Having said all that! Whew! I have one foot in both camps on the topic of reproduction parts. Bob Drake et.al are to be admired for making parts available. Without these guys we would be in big trouble, and I'm sure that there is a continual process of refinement and improvement going on behind the scenes. This is helped by informed and constructive observation and improvement from the market-place.
The other side of this is; poor quality parts that in an ideal world would have been processed thus: Part made, tested, found wanting, discarded, then improved, tested , proved and marketed. The way stuff used to be made. However as the market is realitvely small we must wear the poor quality until the parts are improved. Hopefully this does happen.
In the meantime Mr Drake does himself no favours by rushing to market, then (and this to me is shonky and unacceptable) when a customer enquires about a bad part, staff at Bob Drake are directed to say "Really? You're the first one to complain". That in my book is close to deception, and is unworthy, unethical and unacceptable.
Many comments have been made regarding return shipping, and there lies a legitimate grievance. If a substandard part is knowingly sold that is misrepresentation. If the customer is then required to pay return shipping that adds insult to injury. The result is mistrust and suspicion, not to mention the fact that no-one feels good after being deceived. Most times a small gesture goes a long way, and my suggestion would be for Mr Drake to desist from fobbing customers off with "You're the only guy who's complained." This sad refrain could be replaced with "What exactly is the problem" and after further enquiry "How can we help you to make (situation/product) better." In itself this line of enquiry by sales staff is a huge resource; the business gets relevant and specific information from it's customers without having to pay Marketing people to conduct market research, talk about looking a gift-horse in the mouth. The icing on the cake though would be to offer free return shipping.
Free return shipping is the right thing to do. There's no other way to say it. If you knowingly sell a defective or not 'as described' part, then you are reponsible to the buyer to make that transaction agreeable to the buyer. An easy way to do this would be to offer in-store credit or reimbursment. And yes this is financially painful, and by that method alone would the errors be eliminated or reduced to a tolerable level. Add to that the adoption of a proven methodology in customer service, and it is unlikely this topic would ever have reared it's very ugly head on this and other sites.