Yes, I would fabricate that tool, and I would make it out of
wood, using my jig saw. Make a cardboard template that curls around the rocker shaft and "points" on to the retainer just like the picture. Then cut two of those out of 3/8" hardwood and fasten your pull handle between the two pieces so the points hit the retainer just like the picture. You could also substitute
straps that go around the shaft for the fancy curled ends. That would be even easier. Come to think of it, you could probably use heavy duty zip ties around the shaft and a notched wooden pole that fits down over the retainer and it would work just fine for the few times you did it.
