OK I got my response from BMW.
Part ( hex head bolt ) not available thru BMW as a seperate piece.. No part number, or part description available as they are supplied to BMW as a package.
Sorry, thought i would get more better (???) news...
I did not get to pull one and measure it as i got side tracked diagnosing a knock in my buddies s2000 that tracks with me... so if any one can post the dimensions ill do leg work and try to find a source.. I may have my car available for this on wed or thursday if no one responds.