Ive got two bottles but My rule is that I can only open one if I duplicate the letter on the cap. I don't know why, that's just how I enjoy doing it. I travel a lot for work and check everywhere I go. College towns are the best places or even some beach towns to find it.
If I find a bar that sells it, my goal is usually to keep the cap if they allow when I finish the bottle. I've done that in NYC, Baton Rouge, El Paso and Auburn all on work trips.
A lot of times, it's just luck of the draw.
There is a lot of comparable stuff out there that's relatively easy to find. If I can't find Blantons the Makers 46 is next on the list, then probably some form of Bulleit bourbon. Every now and then I'll check out something random.
Blantons is really the only thing that I seek and it's mainly for the novelty of collecting the caps. They got in with the decor of my house if that's not the sissies thing I've ever posted on here..