I got it from:

Beck-Arnley Foreign car parts
2843 Kirchoff Rd.
Rolling Meadows, IL. 60008
847-577-2473, 3953

I thought it was a bit expensive at roughly $25 given the Behr and other options were all $15, but no one seemed to offer a lower temp tstat out there. What's another ten bucks after you've already bought a new radiator and aux fan?
Good Luck.

Chazmo