Heres some better pictures of it. I don't see any markings on it anywhere.
I have no clue what it would cost to ship this thing but feel free to make an offer.. I'm in SE PA..
I was told this subframe kit was for a bh77 when I bought my B7800. I have since removed it and installed a woods BH75..
Im not sure if it is fact the kit you're looking for but if it looks right I can go take more pictures of it for you..