The guys that made the T Rex pipe had a very nice display at the last WCPS. I'm not sure how they are able to produce pipes the way they do but with enough carvers it may not be that difficult.
Maybe it's not terribly difficult when you have true artistic talent but when you have zero artistic talent, like me, all of these things seem so amazing. I don't know if they do everything freehand, work with some sort of template, or something else but they seem to avoid unevenness/lopsidedness and a lot of other things that makes their work look a step above with a high level of detail.
They have a Halloween pumpkin skull that is on my list but it is a little pricey.