Make my own Kick Panels?

Hi folks!
I've got a '66 valiant more-door, that I'm putting new carpet in, and those old, destroyed kick panels i've been driving around with for years have got to go.

Any ideas or good pictures of what you other guys have done? On these early A-bodies, the kicks are just flat pieces of some sort of card stock or something, mine are about destroyed.

I'm thinking I might just make some out of backer board or something, or maybe cover them in carpet?

What's everybody been doing to theres? I don't have to worry about speakers, the previous owner cut the doors and installed them there.

Just looking for cool suggestions!