Oops! I misread your post when seeing it, and was thinking you were looking for the A/C TXV (tremostatic expansion valve), not the temperature switch/rheostat. After finding the one I have to let you know, I realized that I have a different part than you're looking for.
Sorry for getting your hopes up!
'86 D110 3-door
'97 D90SW - SOLD SEP '14
'94 D90ST - SOLD MAY '13
D90s sold while assigned overseas. You're welcome America!
'06 Range Rover Sport Supercharged
'8X FankenRover D100