I remember a thread a while back that someone had a video of a 4 in 1 bucket on BX. I think it was offered as an option through Kubota in Australia. I remember somebody wanted a 4 in 1 for a BX. I was looking at craigslist tonight and I came across a 4 in 1 bucket for a BX. It is made by W.R. Long.
48" HJ26-48 W.R. Long 4 in 1 bucket for Kubota BX series tractors
HJ2L
48" HJ26-48 W.R. Long 4 in 1 bucket for Kubota BX series tractors
HJ2L