I know of two companies that accept BTC, you just need to get in touch with them to set up the order:
http://www.ospwrd.com/This one is run by a guy I met in #bitcoin on freenode. Cool guy, trying to integrate BTC ordering in-site.
http://www.protoparadigm.com/Heard of this one on reddit, offers pretty much the same stuff.
**EDIT**
Sorry, I thought you were looking for 3D printer materials. I'd be happy to put together a quote for 3D Printed items if you wanted, just let me know what you want printed. I have a small PrintrBot Jr. that I just got yesterday (still figuring it out), but I've used online services like
Shapeways and
Ponoko to get stuff made in the past.