https://www.amazon.com/Fruit-Leather-Silicone-Dehydrator-Sheets/dp/B081ZJS81R/

Edit: My bad these are 12.5" for Nesco. I'll keep trying to find you something.

Closest I could find 11.5"

https://www.amazon.com/Fruit-Leather-Silicone-Dehydrator-Sheets/dp/B08NXCDNW1