I've bought from this company
Oops.... I did search for "termite" and got zero hits.
Christopher A. Young Learn more about Jesus
They are called something like Spectracide Termite Stakes. When I was at Lowes they had two sets, one for about $40 and a smaller one for about $16. Before going to Lowes, about 10 miles away, I stopped at local Kmart and they had zilch for termites.