I have a PC40B Power Source - Battery Charger/Power Supply. It is a 40 Amp and the serial # is 40B193806866. This Converter box in my camper has gone bad and I need to replace it. Can you give me a price for replacing this item and shipping cost to send it to me and how I go about this. Or you can maybe give me a local dealer in my area I can go to get this item. I am in Front Royal, Virginia 22630.