Heavy duty axle with wheel attached (Chester CH2)

Hi all, I’m looking for a heavy-duty trailer or car axle with a central crossbar (not the indespension/offset type).
Plan is to repurpose it as the base for a merry-go-round for the kids (buried in concrete with a platform on top).

If anyone has one going spare, I’d be really grateful. Thanks so much for reading my slightly crazy idea!
Can you help with this request?
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