I still think the right way to do this is to find out what industry standard rims you have and shop for replacement "inner halves" with more off-set.
My guess is 20 minutes at the parts counter (with a knowledgeable parts counter person) would get better results than futzing around trying to get special parts that might or might not work made up at a local machine shop.
Where "better results" means standardized tested parts at commodity prices.
At the very least get the outer rim and inner flange numbers and look them up.
There is almost certainly an on-line catalogue and you will probably find 3 or 4 different flanges as options that can be paired with any given outer rim.
Hmmm, I might just do that for mine as an exercise some time.
My guess is 20 minutes at the parts counter (with a knowledgeable parts counter person) would get better results than futzing around trying to get special parts that might or might not work made up at a local machine shop.
Where "better results" means standardized tested parts at commodity prices.
At the very least get the outer rim and inner flange numbers and look them up.
There is almost certainly an on-line catalogue and you will probably find 3 or 4 different flanges as options that can be paired with any given outer rim.
Hmmm, I might just do that for mine as an exercise some time.