I have an old Case 380 Road Runner BH/FEL tractor, think they were called Landscape models, they were David Brown's that were rebadged.
I bring this up because I was in Robbinsville NC, and one of the Orr's had a weird attachment that had a set of three point hitch arms and the center link, it had the ability to attach to the side of the tractor, and it had the ability to hook up your hydraulics and have draft and height adjustment. He also had a gear box which had David Brown branding that was basically a gear reducer with a PTO output, only one speed though- 540, so no 1:1, or otherwise. So essentially, you could remove your rear bucket and arm and use the tractor as a farm tractor. Instead of buying it, my father found a Zetor 7711 Orchard tractor and bought it. I always regretted that he didn't buy it, as the Case 380 RR Backhoe we have is one heck of a tractor, even without proper outriggers.
At an agricultural auction in Alabama I saw another of one of those adapters like I'd seen in Robbinsville, and I wish I had bought it. So I know they are out there for the 380. Yours may be such a completely different animal, that such a thing doesn't exist.
Something else you might consider is getting one of the cheap quick change 3pt hitch units from Harbor Freight, before they discontinue them, and add some plate and backing, and build it where it will go on the front of your tractor, ala the skid steer adapter above.
