I ordered TacSol lightweight barrels for my Ruger 22/45 and my wife's Browning Buckmark, so these will be the only threaded rimfires we own currently
I hope you are buying two suppressors then. That was the boat I was in when I only had one can, I had to buy a second one for the missus or whoever else was going out. Not fun shooting suppressed while having to wear ear protection because another isn't suppressed, and waiting a year for a second can is just a waste of time.
As far as the independent Alabama guy, is he a dealer or just making and registering for himself? If he is a dealer, he can just Form 3 it to another dealer in Oklahoma, which is tax free. Then when it gets to Oklahoma, he will transfer it to you on a Form 4, which is taxed. The time to go from dealer to dealer is about a month, then anywhere from 5 to 18 months to you. If he is just building them for himself and not a dealer, then there will be an additional tax stamp to go to his dealer, then to your dealer, then to you. So add another 200 bucks if he isn't a dealer.