Was just going to let those of you who inquired that Art really had no interest in doing the conversion to double triggers or to a selective trigger. Oh well.
Replacement: Sorry for not being clear, but the gun is a 12 gauge. I think your idea of picking up a SST gun and swapping the trigger assembly or frames has probably the most merit. Then I would end up with a loaner when my relatives visit. Of course, best case would be to come across a trigger assembly from a scrapped gun...
Anyway, thanks for the ideas!
Paul