Yes, I've been exchanging a few emails with Hamilton Bowen. He seems to specialize in Single-Action revolvers, while I am wanting DA. He hasn't yet conclusively said he can't help me, and we are still exchanging thoughts about this, but I'm not optimistic that this avenue will be fruitful.
As per posts #20-22, it would be good to find somebody who would do 22 LR to 22 Mag conversion on a S&W Model 63. That might scratch my 22 Mag itch.
Will also continue to hope for a way to get an 8-round 327 Mag. I discovered Janz Custom Revolvers (Germany) and have confirmed that they will build exactly what I am looking for, but it would cost ~10,000. I'm considering it, if only I can figure out how to sell everything in my wife's jewelry box, and her car, without her noticing.