when the right cuts came through it was DANK!
So Beasters is "BC Big Bud" which is a child of Big Bud and an unknown sativa. SOME people claim that beasters was originally something called M-39. I can only speculate, but I do believe the m-39 actually indicates the number of the male sativa which they bred with Big Bud.
My friend and his father used to grow Big Bud religiously. A slightly different smoke than beasters. More hazy even though it's supposedly indica. This pheno I pushed through and one other are 100% Big Bud. 2 are some sativa that is taking forever to really bloom and then there is that rubber funky mix that I only got one cut of. I think that is the real deal beasters that you and I are talking about. That light green crystally mothball meets kush-ish smelling bud.
So yes, my situation aside... you're looking to buy "BC Big Bud". Though you can get close to the taste you like from the original Big Bud.