Not sure if they're related.
Alphonso's of Hollywood is supposed to been done by some of the same people who ran Arvo Ojala. That's my understanding anyways.
I purchased this "James Arness" rig from Alphonso's of Hollywood, around 1976, to fit a Ruger Super BlackHawk 7 1/2".
Nice rig but, I no longer have the gun and I appear to have "swelled" past the sizing of the belt anyways.
Bruce
ps - PM me if you're interested in purchasing.