My rims (in my signature) uses the 2" RTD probe from Auber, I'm happy.
I got them from e-bay....the seller is there but the auction is over....he is always selling. Here is the page :http://cgi.ebay.com/ebaymotors/4-20-amp-Heavy-Duty-Toggle-Switches-with-Safety-Cover_W0QQitemZ290416585921QQcmdZViewItemQQptZRace _Car_Parts?hash=item439e2d6cc1
NICE SWITCHES, several colors to choose from and inexpensive in my opinion. Good Luck