Well, this is probably a low percentage problem, but I ordered a couple Zenith carb base gaskets from ECS Tuning and they arrived within a week, as expected. I opened the jetpak envelope when I got it and peeked inside to make sure they were right, fast forward four months and I took them out to find one of them was basically petrified and in about five pieces. Looks like it's been sitting on the shelf for 30 years! ECS bought out some BMW parts sellers and I'm sure they have a lot on old stock. I guess I'm just making people aware to check your parts as soon as you get them. I sent a message to ECS but didn't get and don't expect a response since it's been so long.