I have a new set of 8.25x20 steer tires for my 1959 C60, but the local tire shops won't touch my widowmaker rims (for good reasons). The rims are 6-stud.

What are my alternatives?

I have a good supply of 20" tires, so I'd like to run those if I can.

Are there stock one-piece rims for this year?
Will later model years fit?
Are there more modern 22.5" rims that might be appropriate?

Thanks for your input,

Jason