Here is an example of one of I was looking at...
https://www.amazon.com/36-Silicone-Protective-Blackstone-Waterproof/dp/B0BYHNW5J7/ref=sr\_1\_5?crid=UQF4E3D9SFEL&keywords=blackstone+griddle+mat&qid=1682344285&sprefix=blackstone+griddle+mat%2Caps%2C113&sr=8-5