This is a combination of two different models that I tweaked quite a bit to make it right. I used the model Grumpy Pumpkin and Vampire Bust Sculpt.

https://www.thingiverse.com/thing:159638
https://www.thingiverse.com/thing:37741

There is a standard version and one with the fangs pre-supported that may be helpful.

BTW, you can make the stem a different color by pausing it at the right layer and switching filament. I did this and made the pumpkin part orange and the stem brown which worked well.