That sensor is the same as the one i am hunted for.
You can remover the casing and clean up the workings inside with wirewool but like mine as you replace the casing the tags and contact break and i found it hard to solder with out damaging/ melting the plastics as you need alot of heat.
Its a smiths Gauge product.
after my research i found a company in the states here a email i got from a them showing the part number price and website. The guys name is Charles Kulbeth. I will be finding what vehicles they were used on this week as charles wants $65 off them.
The part # is TB 9011 kit. for 65.00 plus S/H. We have them in stock. Call tech line to place order.
APT Instruments, Tech Line 952-881-7095
9632 Humboldt Ave S, Bloomington MN 55431
A guy here called Dave aka "Ringowner" has got a spare one for me in which i need to reply back to him as yet.