I've seen the alligator one. It looks just like an OEM Panerai but its all rubber. I had to tell my friend to let me try on his watch and its pretty wild. All the little lines and grooves of natural gator are there but its all rubber. I really liked the concept when it came out on blogtowatch, I don't know if they make it for other than Panerai.
https://www.ablogtowatch.com/rubber-...-42mm-watches/