you could weld up a sleave out of 3/8" metal that would slide over your drawbar and pin in place and bolt a hitch on like jpm1 pictured.
This is what we use at work. I don't have any pictures but will try to get some. simple to weld. just a full sleeve that has 2 holes in it that match up to the last 2 holes in the drawbar on one of our m125x tractors. attach a flat vertical plate to the sleeve with a couple of gussets and bold on the pintle hitch and your good to go. comes off easy as well with minimal work. we use one bolt and one pin to make removal faster. we use this hitch to tow our chipper on fence lines and also to pull a 20k lb trailer to haul our bobcat with brush cutter to remote areas where a truck cant go easily. works pretty slick.
edit: watch the tongue on the tires as your tractor can most certainly turn tighter than a truck towing the trailer. one of the fellas i work with found out the hard way when he took off part of some lugs.