you could try wheel dollys such as the one on amazon
ATD Tools 7466 Heavy Duty Car Dolly Set
PUt one on tongue and others on wheels to roll it back or sideways. I have seen them on tv car repair shows moving cars around a shop.
I have an old wheel for your tongue jack but shipping would be pretty high as it weighs a lot. Maybe get a new one at a local trailer or farm store cheaper.
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