Need help finding this Receiver, PLEASE HELP?
Yes there are PCM pistol surface radios on the shared 27MHz surface/air band as well as the 75MHz. surface band and a version of the Alpina is one of them. If your rx is defunct because of and overvoltage (hard to tell exactly what you did from your description) then it needs to be replaced with a matching JR PCM Rx. You cannot use just any Surface Rx.
The Speed control may have been damaged also but you may get lucky.
John