Maybe the niche is too small for BKP to make them.
I would assume so...at least too small relative to the extra work that would go into making them.
By that I mean that I imagine the market for 9 string PUs not being gigantic either but they are made comperably easily by adjusting existing things and I think Tim said that even 9 string PUs will probably be made in small numbers by BKP if requested because the adjustment is rather small, otherwise the market would be far too small to justify making them.
So I assume cost benefit goes against MiniHBs....or at least I hope so cause otherwise I will continue to demand of Tim to make some!
Oh and while we are at it, how about a horseshoe PU? I would looooove a lapsteel with one.