David, yes I did get the screw handled. Bruce is kindly sending me a couple. But thanks for asking.
On the spring, my brother happened by today and had a look. He has had a career in electronics heavy into video equipment. His camera shop was a factory service center for all the major mfg. He took one look and said he was pretty sure he had something that would work. He rarely works on anything consumer grade any more, but TV stations and recording studios from all over send him all sorts of stuff to work on all the time. So he has to keep some stock of many parts still, plus all his leftovers he hasn't tossed from the VCR and camcorder days. I'll give him a day or two to see what he can dig up. I don't think, and I'm pretty sure there isn't clearance for that diameter spring. I can always cut one down for length, but not diameter. I may end up back at the garter spring.