As long as you don't mind going with a different brand of engine I am sure
you can get one in to fit, you would need to know the size of the crankshaft
& length (just the part that sticks out of the sump) and bolt pattern where
the engine mount to the frame. then maybe a few things of changing where the
fuel line is routed and throttle cable etc. Ask the dealer if they can
provide that option. I guess the cost of repairing a JD is not one of its
good point such as this case.