Crank Angle sensor/ Ref or Speed mark sensors

[Festungeuropa]

Hi from Dunedin NZ:

My car [83 944 USA Spec] was running well @ 153,000 mls. http://i57.photobucket.com/albums/g230/spangleking/pors_lkdunstn_pb-1.jpg
I parked it up and four hours later it would not start. Not the coil but one crank sensor [rear of head] is like an open circuit and the other reads about 300,000 ohms. Pt No. 0261210003 [both sensors have the same pt No.] Called a 'reference mark sensor' and a 'speed mark sensor' in the Haynes Manual. We call them 'crank angle sensors' here.

I need one, can anyone close by help?

Festungeuropa