I went with the flag pole bracket idea. I found some at Home Depot. They are plastic, so I'm a bit concerned, but time will tell.
I also bought a long bicycle brake cable to reach when the handle is extended. The problem of course, is that it's too short to fold the handle level, and if you make the cable long enough so the handle folds flat, there is too much slack for it to work with the handle extended. I'm going to put in a cable splitter, that can be found at bicycle shops. That way I (you) can have the cable the correct length to work with the handle extended, and disconnect the splitter to fold the handle flat.
Hmmm,
I just had another thought while typing this....move the release handle to the side of the platform and set the cable to have the right length when the table is at the highest it will be used.
Anyway......I should have done this years ago, it's already saving my back