Electric Fan Thermostat/Switch ?

[PHOENIX]

I have an electric fan on my truck now. It works great and sucks mad juice. Heres some pictures of my back-up fan, the exact same as the one in the truck:
http://www.73-87.com/~phoenix/Electricfan-01.jpg
http://www.73-87.com/~phoenix/Electricfan-02.jpg
http://www.73-87.com/~phoenix/Electricfan-03.jpg
Ill get some pictures of the fan installed later.

Anyway onto the question. Does anyone make a thermostat/switch (you know to turn it on automatically) that turns on at 210 or even 200 then turns off at 185 or even 190? Right now I have it controlled by a toggle switch, which I like because I control it however I want. The only time I need it is in a drive through or a long stop light. Most the time its off, even in this AZ heat. When I installed the fan I looked around and couldnt find one that fit my needs. There was one that was adjustable. I might be interested in an adjustable thermostat/switch. Please post whatever you can find that meets these needs.

Thank you