GAM would take you on that. Have you tried bottom rung charter? You haven't made it clear how much command you have.
From what you've said it appears you did 1300-1500hours instructing, got into a charter mob (did 200hours single?) then a few hundred multi and the company decided they'd grab you by the balls and put you onto a multi crew turbine? Or its all META command then into a turbine right seat?
Look at places that need turbo prop captains, who's younger guys are not ready. Few months in the right on a B200 then into the left? I can't see that your hours would be that big of a hinderance. You shouldn't have an issue getting on a piston twin in a capital city.