Mag Wheel

I had a unicycle about 15 years ago that had a 6 spoke mag wheel mad of
nylon. The stickers said Kuwahara, but I’m not sure if the unicycle was
really that brand. I’m looking for another. I weigh c. 220 lbs, am 6’1"
tall, I need a sturdy unicycle. Where do I get one for less than $300? Is
anyone selling theirs? Thanks for any help, Dan.