I have a mint one, came from my 60S, now has a 60SX sensor fitted.
1.1 and 1.2 sensors are same, but if your dials don't have a temp gauge (just a too late light) then you need this one i have.
£5 if you want it, £30.02 for the SX one from a fiat dealer, S model sensor is about £25 AFAIK
scrappies will be able to get you one for £3-4 but no gurentee it works the job, and the one I got my SX from didn't know of the difference either (one is a bimetalic stip type, the other is a temp sensor).