Deere sells one, least they used to, used to see it pictured in the owners manuals. Easy enough to make one, there is a thick plate that goes under the drawbar and attaches at the front of the hammer strap and two chains run up to a bracket that bolts onto the rear housing where the third link would attach. Was either eye bolts or turn buckles that you tightened to take up the load. Also bolting the lower support to the top one at the roller carriage helps hold things together.
FYI IMO a 42 is going to have its hands very full with a 1063 wagon, I used to pull a 1044 which was only 120 bale with the 4020 and it was scratching big time and more than once if things happened just right when loaded it would pick the front axle up. If you are on flat ground you might be ok but in hills or rough ground you are gonna be short on power and bouncing all over the place. Least with a 1063 you can shorten the drawbar right up which will help some but those larger wagons put a huge load on the back of a tractor.
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