Yeah, I wish I asked. I am not happy it happened, but the bag was filthy, and had to be cleaned nevertheless. It was not usable in the condition it was in. So what are my options now? The bag will never be original again, but this is of very little concern to me. I don't think I "ruined" a historical rarity, or a museum piece, and since I am not a collector...........
I finally found the "vacpartspluss" that people talked about on this forum (for some reason my search engine skipped it several times), and I found a gray, open top bag, with red trim, and whole bunch of little "kirby" logos all over it. This will fit my 515 nicely, and provide service for the rest of my life. Old bag will be stored in the box for future generations. And that about settles it. Now I can sleep again.