I looked on Amazon and found these: https://www.amazon.com/HuiYouHui-Reusable-translucent-stretchable-Alternative/dp/B08FBV7YLP/ref=sr_1_7?crid=O54XXROX3WA9&keywords=food+covers+stretch+reusable&qid=1674226566&sprefix=food+covers%2Caps%2C150&sr=8-7

It's like a shower cap for food! I haven't had luck finding any that would be large enough for a tray or very large plate.