You should be able to use the RT Pro On/Off with no problems. This is stock on the X-Valve, too. I believe using the stock Classic On/Off was what caused a good bit of the problems with the first Hyperframes, Centerflag than came out with their own On/Off to fix the problem, but the RT Pro part is nearly identical (if not better) and should be your fix.
As for the E-Mag charger, you should be able to use a Radio Shack one, do a search for the correct version over on AO. You could always buy straight from AGD or Tunaman (
www.tunamart.com) if they keep them on hand...