My compressor has been rebuilt, fresh 134A refrigerant installed & my mechanic has reviewed Chrysler Master Tech Serv Conference Bulletin 71-4 on Auto Temp-II & reports all equipment is operating correctly; yet still the AC does not produce cold air (blows warm air). We have located & ordered a dryer & need to obtain an expansion valve for my Imperial; Does any member have one or know a source for one? Thanks!