Not that I know anything about these things, but this prop screams servo motors and arduino controls to me.
Luckily there are quite a few knowledgeable people on this forum who very well could help you out with this. I'll be following this to see what all they say and suggest. I think this is a cool prop and it would be great if someone could re-create it somehow and maybe make it more real looking. Not that it isn't cute as it is, but cute isn't always what people want to decorate with. The pattern of the cat you found, looks more real to me. I think it would be more startling to have a real looking cat arching it's back and growling, hissing and yowling at passer bys.