35 floor thickness?

[RalphM]

Due to the lack of quality repop floors for my 35 Coupe, most of which are not even close to original( street rod style). I’ve decided to make my own, well on the flat ones anyway. 🙂
I made patterns from what’s left, but what is the thickness of the sheeting to match what’s there?
Most of my trunk area, and the kick up where the drive line passes through is the worst.
This car was an old Hot Rod from the 50’s, so not show quality by any means, but I want it to look right.