Can you be a bit more specific? i.e. what are you trying to do? I once made up rims for the rear of a dragster as it was a special size for a vehicle that was lighter than normal. We bought spun aluminium inner and outer halves from a metal spinner and made up our own centre sections. This effectively makes three piece rims in the style of the classic centerline wheels. Whether this is what you are talking about or not, I do not know.