I have a Subaru OEM performance gauge pack on my 2004 STi. The oil temperature indication has stopped working. I believe the problem lies with oil temp sensor that is part of the oil pan drain plug. I read open or infinite resistance across the two leads from the sensor. I have called the local Subaru dealer to order a new sensor (part number H5010FC025) but have been told the part is obsolete and the only way to get one is to order the complete gauge pack. Does anybody know where I could get one of these? Thanks.