We have a 1979 Piper PA-32RT-300 and we are having an issue with the Airborne fuel selector valve (1H65-5). It looks like an internal plastic component of the fuel valve needs replaced along with some o-rings. Is there any source for these? Does anyone have an illustrated parts list or any schematic for these valves? A used/junk Airborne 1H65 valve would also work that we could scavenge that internal plastic piece for our purposes. Thanks!