I'm glad I found this post I have been looking for those rivets but couldn't find the part number. I was looking for info on convertible top motor replacement and wandered across this post.
BMW of Alexandria does a lot of internet business and has these rivets for .39 which makes them a lot more palatable.
http://parts.bmwofalexandria.com/pro...%252d908).html
Gotta save as much $$$ as I can for the convertible top motor LOL