floorpan?

I've got a '74 Z28.
She's got a floorpan issue. For example, if you lean back in the seat, the floorpan comes with.
Any ideas where I can get myself a new one for less than outrageously expensive. I'm perfectly fine with absurdly expensive, however.

If you look on Google there are a few restoration places that sell them. The one I looked at was ninety bucks plus shipping for one side. Occasionally eBay has a few too.

Yeah, I found a pretty good one for about that... And it's stainless, which means after sealant and primer, it shouldn't ever have rust problems...