I just bought a Prius that has a XM SAT antenna build in that can (supposedly) either do Sirius or XM according to Toyota. The head unit is SAT ready. Does anyone know if there is a Sirius XM "all in one" receiver that I can plug into my Prius and get both. I want to go the receiver only so I can control the Sirius/ XM signal from my steering wheel so I don't want to go the M!RGE plug and play route. Just the receiver and use the car's existing equipment. Any help?