Any boat dealer can get you a single or double axle inboard boat trailer and get the bunks fitted for your boat. Ameratrail is sucky, worst part of the boat, by far. I have owned two, replaced everything, still had tire failures from day one, I would not own one. every part of it is sketchy. Electrical, brakes, axles, fender and tire offsets blah blah blah
Go talk to your local inboard dealer, maliboo, nautike, mastercash etc. they sell trailers all day and can set them up any way you like.