There was few more mags made back then, they may pop into my mind.
Alpabets, I think
Shelby Dowd (might be Henry A,s)
Curtis made a Morris clone
Dymag
American Racing 12 spoke, were made by Sifton, then PM had them
Crager solid 15"
C&G mfg.. made a overlength front hub laced for the rear, and mags
Hallcrafts wire c/w disc model and welded steel.
I have a set from the 80s for Kaw, that are spun and riveted together
cant ID em yet, but they look familiar