I don't really know the availability of them. I got mine from ebay. They come with Dracula bite action and sometime can be found for a great price. I didn't find any when I checked today, only one for $7 which is high if you are only looking for the bat creature.
I have dismantled the one I have. As you can see in the picture the winds and tail come off in one part and the arms and legs pop off. I'll see if I can get a few more to work with. I might be able to articulate the head, body, etc.
If anyone else has something that might work, please post picture. Thanks