mm17

I went to the Home Depot nearby and initially picked up some steel bar stock. But then figured I could just buy an angle bracket which is used for shelving. It has at least one hole available for use already. So I bought one of those, cut off about a 2.5 inch section with one hole available which the skewer could go through. Shaped that corner a little bit to fit into the corner of the dropout, and then drilled a 7/16" hole for the coupling. Used a 3/8" nut, bolt and locking washer to mount the coupling to this new adapter. Woohoo!
See the pictures attached.