I've got a brand new oil temperature sensor (PN: H5010FC025) for sale. I chased it down across all Subaru dealers in the USA and got the very last one back in 2010. You can't get them unless you buy the gauge pack now.
I'll throw in the extra 10 drain plug gaskets (the sensor has one as well) for free.
Let me know if you are interested .. you can see it here: