You couldn't just put a piece of plywood over the holes?

>Gee, it's too bad I don't still have my 1985 VW Golf. 750,000km and still running great. Unfortunatly, I could see the road through parts of the floor, so I had to get rid of it. Of course it was a diesel, stick shift, so beyond learning to drive, it could also be used for waking the neighbourhood in the morning.