I was looking for the same thing for my Koyker. They they had the brackets for $180.00, or they had a part to replace the attachment style from Koyker proprietary to standard skid steer. I got the part that converted it to standard skid steer. It was more expensive up front, but if I get one or two attachments that are skid steer, I'll have made my money back, plus.
I would have asked bush hog if you could get the part to convert you loader to standard skid steer style.
Wedge