I hear ya. I have done alot of mechanical work to mine over the years, Time to do the floorboards and paint plus a couple of other things. I will be right there with ya.
I have a guy building me some from scratch. I haven't seen these replacement floor but some are missing the hump(lack of words) out by the door. Kinda of expensive though.
You remind me of a good friend of mine I haven't seen in a long time.... We use to restore older Z's and VW beetles back in the day. We also had a great time in the backyard shop and had a many good looking Z's to show for it..