Nice looking unit. I doubt you are going to find a shop that will accept the liability of installing belts.
I think the biggest issue for them would be anchoring them sufficiently. You might want to talk to a shop that specializes in modifications (Racing shop etc).
You other option might be if you want to take a whack at it is, look around the J.C. Whitney catalog and see if they have installations for Dune buggies etc. It might give you more ideas.
2001 Itasca Horizon 36LD Cat
Retired Air Force, One lovely Angel
, 2 Cats and three birds.