Well, here's a novel idea.

Instead of redesigning the wheel (although I think keeping the X wheels would be great) why not use your design talents and design a bolt on Solid Axle Swap instead?

You could use the last model solid axle from a Toyota, with some coilovers. Hiem jointed locating rods and track bar, and convert the steering linkage to a Jeep style crossover steering setup.

Make it weldable if you want. Make it so that folks would have to locate their own axle (Dana 44 would suffice). But I'm just a simple guy.