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.
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2001 Itasca Horizon 36LD Cat
Retired Air Force, One lovely Angel
, 2 Cats and three birds.