They make a ton of aftermarket wheels for golf carts. I would think something like this could be adapted to a Cub Cadet front spindle. You may have to cut the center out of one of your regular CC wheels, drill, and bolt it to this rim, but I would think that would be easy enough to do. I'm not sure I'd spend the money for new fron spindles, but it's problably 6 one, half dozen the other.
We'll definitely want to see some pics of the pimped out ride!