Here's a good one for you - the little rubber bumpers inside the fuel door on my car look old and I want to get new ones. Good luck guessing the actual name of them and finding them in the PET or online. It took a good half hour and I'm really not sure I found them yet - I found something called a "Rubber Stop", but Pelican and AutoAtlanta state that only 1 is required, whereas our cars use 2. The part number is 944 504 397 00, and of course Pelican says it's a "German-only" part, (which is most likely NLA). Looks like I'll be refurbishing the ones I've got or making some new ones out of rubber stock on the lathe.