If you want to purchase some thermal solder, contact me
 

xjinn and I are organizing a group buy on some thermal solder. If you are interested, email me at tapsc@zoominternet.net

Excuse my ignorance, but what is thermal solder used for?

it would really benefit you to post the thermal conductiviy and melting point of said solder.

i'm currently using silver solder in my soldering applications, and it has a pretty high thermal conductivity and a relatively low melting point. this stuff can be had at your local plumbing store for cheap. check the portions of silver/other metals when you buy, too. try to get some 20% silver stuff. the other 80% is usually tin or copper.