These are very hard to find, but do show up on e-bay on occasion.
I have the crouching devil. As a matter of fact, the photo of the devil in your post is actually mine posed in my living room when we did a side show freak scene for our party. Unfortunately, I do not plan on selling this prop in the near future, as he has a permanent home with me for now.
I hope you can find one at a reasonable price. They are well made and detailed nicely. They are heavy, and bulky, so shipping will be a bit pricey too.
I'd really like to get a hold of one of these awesome guys. He doesn't have to work, pretty much any condition would be fine with me. So if you have one that's all dressed up with no place to "ghoul", please let me know. Thanks!
EDIT: It actually doesn't have to be the Spencer's one, I'd be...