Otterlynx, I assume that you are referring to the Winegard auto dish on your RV roof.
I've been with Shaw over the years and used a tripod to get reception, a couple of years ago I installed a Winegard dish on the RV roof. I was concerned that Shaw would eventually "range" their sats so that you couldn't receive in the US (the 3rd new sat is ranged, but duplicates most of the stuff on the other 2 sats). I asked around if I could convert the Winegard from Shaw to a US service and got the answer from a Winegard tech that it could not be converted. I assume the same would apply to Bell, since the services are similar.
I would contact Winegard for a confirmation. Sorry!