I stumbled on THIS 3 point hitch system for ATVs/UTVs.
They describe the hitches as Cat 0 (specifically state the 20" draw bar width) so the tool bar must be Cat 0. Unfortunately the video is old and apparently they've discontinued many of the implements. They do still sell the disc, chisel plow, cultivator and 48" back blade. Summit Racing seems to have the best prices and free shipping. I've linked the pieces below: