Of course, it's always fun to buy another tool, but
http://www.bunchobikes.com/repair2.htm shows how to get the job done in a couple of ways.
http://raleigh-chopper-net.tripod.com/Tech_Stuff.htm also shows the clamp method, and the Partk tool thing in action.
Seems silly to end up paying around $10 for a small pin, especially when you can buy an entire frame with the kickstand for $35 (
http://cgi.ebay.com/22-INCH-SCHWINN-VARSITY-FRAME-WITH-KICKSTAND_W0QQitemZ230163590156). Of course, then you'd have to build another bike. =)
I'll probably try the whole screw thing at some point if I can't get my hands on a retaining pin and report back.