Ted, when I replaced the casters on my player, and also on my
Orchestrelle, I used an ordinary "front-end" jack, an air-operated
car jack similar in operation to a fork lift, used by service stations.
I know that not everyone has one, but they work.  Perhaps a local auto
repair shop would rent you theirs, then all you would need is a couple
of friends to put the piano on it.  You'd need an air compressor, tho...

Bob Loesch