Two Brothers Racing used to sell a kit that had eight springpins and a drill bit to drill the threaded holes to fit the pins.
If you can get a "McMaster Carr" industrial catalog, they have them. They are about $3.00 apeice.
Found them online, thanks. It looks like they have about everything bolt and fastener wise. Something like this
http://www.mcmaster.com/#plastic-head-thumb-screws/=jpcvi1would probably be great for the purpose, but I can't tell if they have the right size. I'll print this page and see if I can find them locally.