Smallest cushion rubber you can buy?

[merlinb]

I'm restoring a 5ft antique table. The cusion rubber is very simple, just 1/4" square section rubber (not an L shape like on a full size table). It has perished and I can't find rubber of the same size anywhere. What is the smallest rubber they use on mini tables these days?
https://i.postimg.cc/gJrM3bp9/IMG-20...-175451452.jpg