Source for "keystone" style speaker connectors?
 

If you're not sure what I'm talking about, these are what I need...

http://store3.yimg.com/I/sweetronicsstore_1722_89584317

They plug into the same type of wall plate that your standard keystone Cat 5 connector does. The brand doesn't matter, they should be a low cost version though. Most that I'm finding seem to be much more expensive than I expected.

www.partsexpress.com (unless you already checked there)

Yup, I've already tried there. They had the regular posts like you use in a speaker box, but I couldn't find any that were for this type of application.

BTW, if anyone is wondering, I've pulled network/speaker/coax wire to several locations around my house. The network connections will use the keystone jacks and wall plates, so I figured it would be "neater" if I did the same with the speakers instead of just running wire directly out of the openings in the plates.