Early A floor repair options?

Wow! That's incredible! Very impressive.

Mike, sounds like you might need a patch from a donor car or make your own. I'm pretty sure there's a patch for the area below the rear seat on eBay right now, but it's from a Valiant and I think the rear parts of the floor were different. You could probably fab something with steel panels, but it all depends on how original you're going for. I used truck bed liner all under my car, so I wasn't too worried about some slight weld welts.