The cost of actually doing 'prints' for sale is fairly expensive. I don't know anyone doing this *yet* in Ontario. I say yet because I plan to once we are open to the public. One wall of the gift shop area is planned to be a gallery of herp art/photography. For single prints, it is cheaper to take the photo negative or slide, and get an enlargement to the size you want. Then get the enlargement framed or plaque mounted.
The people I know would most likely have lots of good shots of native herps suitable for framing. I've got a couple on the wall myself. I don't know of anyone with pics of what you're looking for. You might try specifically asking if anyone has good quality pictures of the species you want. They need to be suitable quality for enlargment, which rules out all but the best digitals.