Nice job Selrahc on providing that link for RParmentier...
I have also flipped an engine off the table. It isn't the disaster you think at the moment it happens. Lionel.com has done a good job of providing parts for modern equipment. I don't even think the prices are outrageous. Their packaging and delivery are very quick.
It may be a little intimidating at first but it isn't that hard to pull these babies apart and replace powered trucks, sound boards, lights, couplers, smoke units, etc. Go slow, ask questions and give it a try....