www.partsgeek.com

They have really good prices on replacement and new parts. I am not sure on some of the brands that they sell but there is a lot of parts that are name brand are at very very cheap prices.

 

Various places sell parts on the web cheap...just don't expect any support....
Know exactly what you need...and hope it fits.
Many places were/are still selling the old thermost with the leaky gasket....so on some places, buyer be warned.

 

Surprisingly other then not having phone support these guys are working with me through emails with my BMW's brakes. I know what you are saying about knowing if it fits or not though. That is what makes some of it questionable. With the brakes though I went to Centric's website and searched all their parts to check to see what came in the packages to make sure it was what I wanted. They are the same company that does Powerslot and I have had them on my MINI and my Spec V so I know them well. We will see what happens with the parts and the website when they get here. I also plan on checking what parts are sourced for the MINI and might consider some replacement from them.

 

I've had good luck with parts.com as well. They come from a BMW&MINI dealer in Texas, so they have access to the document system, they will send the retrofit instructions if you request them.