I find it rather sad I guess that the parts that were made 75 years ago can not be made to any precision today, For gosh sakes, we think we are so smart, but we can't even copy a part in hand that was made in 1938. There is something wrong, be it intelligence, be it engineering, be it a take it or leave it attitude, there is definitely something wrong. It's very arrogant of the manufacturer/ parts broker to accept this misfitment of components as business as usual. It costs only pennies to build it to a better standard per unit as compared to a poor one, the actual making of the part is most likely the least expensive part of the operation. The actual money spent on a $50 part and the margin it represents is mostly spent on USA intellect, the brain trust that designed and composed the part, the shipping, the infrastructure of the company to sell market and pipe line the part. The fumble of the ball is actually occurring on this side of the pond, those guys over there have actually in most cases all of the newest and best equipment to make stuff, they will make what ever you want to any spec, the spec and acceptance of product is all on this side of the pond. I do not blame the guy in China making 30 cents an hour for the product quality, I blame the guy here making a comfortable wage calling the shots for setting the standard and trying to play the game with a square ball.
The larger problem is that when a container of product comes in and does not meet spec it should be sent back, in critical cases it would be, unfortunately we will buy at the best price, then the off product gets market dumped at a lower price, pulls down the price median, destroys the ability of a manufacturer supplier to compete against that off product and next you have the off product as the new market standard. If you as the consumer accept that product as fit, that is your new quality mark median. If you buy split pants cause they are cheap, the fashion will be split pants, don't cry if your fanny is cold when you buy split pants.