I lucked out. Without having your measurements, 66andblue, I went ahead and tack welded the arm to the door. Just "sized" things up to make sure the door would open all the way, and close without the arm binding up. Then..... tack welded in three spots around the arm, with cooling time in between tacks. Also, I had a wet rag against the front of my door to keep the heat from melting my paint.
Fabricating a new fork to replace my missing fork was easy. I had scrap metal that measured within 0.001" of the thickness of the original fork.
And my luck continued........ I had a section of copper tubing that appeared to be close in size. Stuffed the spring inside the tubing and it was a great fit. Cut the tubing to just under 2", greased up the spring and forks, assembled everything inside the copper tube............and I'm back in business.
Thank to all..............