Wireless Thermometer for Vehicle?

[ApacheTrout]

Does anyone have a recommendation for a wireless thermometer for a vehicle?  I just bought a bare-bones base model Silverado and am missing the thermometer from the old vehicle.

 

Edited for further info:

 

To be clear, I've searched online for "wireless car thermometer", "wireless vehicle thermometer", "dashboard thermometer" and other variations, and the results seem to depict junk (i.e. less than $10) from websites with names that don't inspire confidence (such as ahappydeal.com).  It also appears this question was asked way back in 2006 at EasternUswx, but that thread was unviewable.