I bolted a receiver to my Gravely sulky. Could do the same thing to the 3 pt drawbar that I just bought from TSC. TSC also has the U-bolt kits and the receivers. Think a lot cheaper than $200.
I spent $70 recently for the drawbar, bolts and metal bars to mount the drawbar to my 3 pt. I've it painted now and about ready to put back together. So, I can take pics and post it. It'll be a drawbar with metal framing to connect also to the top link. On mine, I've an additional hole to run another top link back to the old 2" soil ripper, to raise and lower the back end of it.
Ralph