In my brothers Buick roadster you will see a Buick Banjo wheel that we reduced with an aftermarket steering wheel ring. Calcustom or something like that, we cut "windows" the rim with a die grinder and cut off disc at each spoke. We then cut the spokes of the banjo wheel to the correct length so when it was set in the rim the spokes went across the rim to the outside. We welded the spokes into the rim and to both inner and outer of the rim. Then cut the pieces that filled the windows to fit around the spokes as they entered the rim and welded them back in.