Supermoto wheels/wheel parts

[_Iain_]

Basicly looking for some supermoto wheels.

Resarch tells me that i'm looking for wheels for the following

1989-1997 CR125
1989-1997 CR250
1989-2001 CR500

However, would also be quite happy to have a crack at building my own, so if you've got a 36 spoke 3.50" rim, or a 4.25" 32 spoke rim then that'd be pretty awesome too. Perhaps some built up supermoto wheels with the 3.50/36 spoke & 4.25/32 spoke rims on em? Could then dissasemble & rebuild around my hubs.

Much appreciated
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Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340