Greetings: I am trying to find a replacement power supply for my SIR-PNP2 receiver home dock (SIR-HK1). I have called Audiovox and they cannot find the part number and apparently no longer have the item in stock. I would purchase another Home Dock kit just for the power supply but can't seem to find anyone that I would trust giving a credit card number to. I looked at the Sportster SP-H1/H2 Home Dock and the power supply included with it appears to have the same plug but I cannot tell what the output voltage is. On the one I have it is 12V 2.0A with negative on the outside and positive internal. If someone out there has the Sportster home dock would they please tell me what the voltage/amps output are? Thanks for any help.