I'm on the lookout for a source of 6x6 brake pads.

The front discs run pads with a LR P/N HYL8655. I cannot find a cross reference for these, and they don't seem to be used on other Defenders/Perenties.

The rears use HYM443 pads, but these cross reference to DB1176BM. I am wondering in the -BM in the aftermarket number indicates if these are somehow special from regular DB1176 pads, or it just specifies a compound or premium range difference?