....had a whole 3b H55f spare box 1 month ago - but now sold sorry. You can pick up h55f 3b boxes over here in New Zealand for around NZD$350-400 without transfer case.
Which h55f do you have (ie in put shaft) and do you have a transfer case? You can mate the h55f with an alloy 3b bell housing from a 70 series (I have a spare one), but you'll need a 3b input shaft to get the correct length in the bell housing