Bought a set of these and they're holding well so far.

http://cgi.ebay.com/ebaymotors/ws/eB...m=310292695644

I also bought a set of C634 fasteners, but they seem like a mm too big. They might fit on some other fastener holes though. And for a few bucks, might be worth having around anyways.

 

I will try these. I purchased APR wind splitter under tray so these may come in handy.