Sorry, that you have had problems with NAPA having what you need. At our NAPA store, where I work, we have some of the same problems with parts for older cars. We just can't afford to keep parts on the shelves for older cars. We can usually get them overnight, if our warehouse has them in stock. Most folks with antique cars will wait a day or two for us to get what they need.I picked up the kit from Mike's Afordable Parts!
Where I am from, our joke is that NAPA stands for Never Any Parts Available, "We don't have it but we can get it for you!"