Floor mat, wagon
I don't know for sure, but I'd be willing to bet that no one reproduces rubber mats for these cars. Most people want to upgrade their cars and would go with carpet.
I also own a '59 F100, which came with a rubber floor mat. Places like Dennis Carpenter reproduce the mats for these trucks. Maybe a couple of those mats and an X-acto knife will give you something you can live with.