looks almost like the sleeve hitch I have here for one of mine, basically a sleeve hitch is a "2 point" hitch missing the center top link.
I got my sleeve hitch from a guy an hour away that advertised a GT18 part out on CL, it is a "real" Ariens setup, not home made. was wanting to make another one, copying those arms but I have seen several people talk about a Cat 0, 3 point setup actually marketed for a Kubota, for around $60 that they are happy with,
for $60 I don't think I could buy the pivots to build my own like members such as Wm McNett have shown that they have done.... I mean great job done there, but one of those instances where a whole unit can be bought for less than the cost of parts, plus the time it takes