Considering the value of these two Holy Grails no doubt bootlegs are out there. Here are a very nice version of Yak face and the Blue Snagglettoth. They look great when you see them in a pile of figures, on a small picture online or on your phone, but beware.
The key on these two are the feet, which have NO holes in them. No doubt in the future more detailed boots or customs will come out of the woods. If your looking for reasonably priced fillers for your collection these will of and purchased them on eBay.