I utilized the old coverings as a pattern and simply layed over a piece of brown vinyl cut from a woman's brown vinyl purse I purchased from Good Will. The vinyl was a little thicker than I wanted, but it worked pretty well. I used a xacto knife to cut the pattern, but the real challenge was to find the proper glue. On an old clunker GS model, I used white tacky glue first; then tried some Elmer's spray adhesive, then some contact cement, and finally purchased a tube of 527 glue at a fabric store, which appears to be holding quite well. I tape the ends down with masking tape to let it dry in place and this seems to work out OK. The GSN model will be a little more difficult due to the small name plates which have to be cut in the pattern, if I choose to use them. The MG-1 doesn't have any, making the pattern a little easier to cut.
What I've learned thus far, is that the proper glue shouldn't set up to quickly, like contact cement, because you may have to move the cut vinyl around a bit to get it to fit properly. The thickness of the vinyl is also important, but while this was a little thicker than I wanted, it seemed to work work out OK. I tried to get some scrape pieces of vinyl at a fabric store, i.e., Joanne's, but the scrape pieces were too large - they'd probably cover 50 cameras. So, it appears that women's purses remain a good source, especially in various colors. I also purchased a vinyl covered 3 ring binder that may or may not work, I'll see. This one happened to be in blue, and I may try that on one of my GSNs. Pictures will follow as things progress.