A while ago I made these parts, with which to mount a Nuovo Record rear derailleur on to a Simplex dropout hanger.
(By the way, my apologies to new member BFBIKEFAN, who left a message on my profile page asking if he could acquire one of these kits. Not sure he ever received my reply. But, here it is again. I'm not really offering these on the market, so to speak. These require too much fiddling and customizing of the rear derailleur so that I don't feel comfortable with this being a "plug and play" scenario. It was an interesting exercise but, I've moved on to other hair-brained projects.)