I found an A-Frame at Princess 10-12 yrs ago when I first got my M38A1. Similar to this one,
https://www.princessauto.com/en/deta...ar/A-p8041550e I've used it to pull start the Jeep. The only issue was it needed two 7/16 holes drilled in the bumper to attach two heavy gauge plates as the joining surface.
The military one has a heavy pin that adjusts for telescoping the length. It also has a complicated, but effective, bicycle type chain and bolt tie down assembly to attach to a square bumper.