i have a pack of the bx's, but haven't tried any yet... they're supposed to be pretty dank from all i've heard... the bx's will have more variation in them then the s1's, so depending on what you're looking for, order accordingly...
i've got it from a very reliable source that e$cobar that works closely with sannies seeds, is working on a c99 of his own that he's working from an original brothers grimm stock... should be out pretty soon from my source..
no real word on when mosca's is going to come out again though..
the best thing i could suggest is try and see if mosca seeds has their own site like most breeders do, and if so, try emailing them directly at their site.. you'd be surprised at some of the info that you can find out be doing so..