Here's a homemade 3 pt hitch hauler my buddy made for his 1953 John Deere model 40. It's made from angle iron and square stock from a salvaged home gym/weight set. There's a video of it also at the link below for your viewing pleasure!
YouTube - 1953 John Deere Model 40 - Homemade TPH Hauler
YouTube - 1953 John Deere Model 40 - Homemade TPH Hauler