You and I both haha! I haven't seen any Trail Boss or Unique since 2020 along my Jasper/Canton/Smyrna run of stores. I've been running W231 as a substitute in 45 Colt loads but I'm not a fan.
I use it in 3030 and 4570 for target loads and in 223 cases in a little rugger 77 bolt action... performs like a hornet but in a much better riffle and better cases. I would use unique as a sub also, but it has also been no place either. Finding substitute powders for handgun hasn't been to bad, I tried some E3 in 45acp because it was all I could find at the time.... in honesty I'm glad I did as I prefer it and I was able to get a decade's supply at regular ( under 20 bucks a pound) pricing during the covid thing.