If you can find one to try, I'd take a look at the Blackhawk SERPA for a 1911, my HP fits in all my 1911 holsters, other than that I don't think you'll have much luck finding exactly what you're looking for as there aren't that many duty rigs (most if not all "retention" holsters
are duty rigs) out there for the BHP, but I could be wrong,
Bianchi does have a paddle for the BHP