Rich lives about 5 minutes away from me. I can't count the amount of miscellaneous things I've bought big and small from him. In the Spring I was instructing at the BMW Trillium day and was battling overheating issues which I thought was a bad rad. We went back to his house and literally scrounged up an entire new style rad setup for my car. Luckily it ended up being a thermostat.
Also another good resource is Rudy Glarner "CRAZY AZN".
Both local and if one doesn't have your gear the other will.
If you get to know them well you may even get the instant SMS parts line for inquiries.