Silicone lid for Tea Forte cup?

Hello! A friend gifted me a Tea Forte Kati cup a couple years ago and I love it! But can anyone recommend a silicone travel-style lid that will fit on it?

The lid it came with just sort of sits on top and wouldn’t be stable for the car. I keep seeing these ads for cute ceramic travel cups, and I sorta want one, but I have something that would work perfectly well if I could find the right lid.

Has anyone else tried this and found one that fits? TIA!