Hi, I think I may have a problem with my lift pump p/n 8E0 919 050 R. Can't find one at all - its new replacement from TPS is p/n 8Eo 919 050 AK @ £440. Does anybody have one? or know what other versions may fit / work? as I'm trying to source a used one (already sunk too much money into this car...).. thanks in advance.