oh, so I was thinking about a whole new hub (to be designed/made). It's possible you could get just an adapter made, that bolts onto where the studs are, just pushing the new assembly mounting surface out further. You may need to file/machine down the hub-centric ring. You could then get an appropriate offset wheel, if they're even made. Not "un-doable", probably not TOO expensive (to have an adapter made), but finding and buying wheels that would fit is at least a few grand.