[C320-list] dsc radio/gps

[Moondancer5 at comcast.net]

No matter how many gps dealers I email, no one answers, maybe someone here would know:

I have a Garmin 276c in the cockpit, and would like to get a backup gps to attach to my icom 604 radio in the cabin. Is there something out there that is inexpensive and able to be installed inside, will I have to get separate antenna and drill thru anthing to get reception? I don't care about having another chartplotter (someday the 276 can be the backup), just something that will spit out position to me and the radio.

Thanks,

Susan