I was looking at the Just Right PCC's, not for the near term, but maybe the 45 ACP version for some time in the not so distant future. They also make a 10mm version that is actually in stock. Don't have any 10mm Glock mags though.
I have one, my father has one. Both ugly but they handle well and its nice having something that interchanges mags with common handguns. Mine is 9mm but I got the .45 kit. Would like to get a 10mm kit but they don't seem to sell them separately. Much more comfortable than the Keltec Sub2k.