https://www.amazon.com/dp/B087MZ169G/

That’s the item number for the one I bought, but now it comes up as brown instead of red. Huh. I tried searching Amazon for “Mazda key fob red leather” but didn’t have much luck. If you want red, you might have to go with TPA, which is also very protective, but…it’s not leather.

I also bought a silicone cover for my spare key fob, and it works great, too.