Classic pumpkin model from https://grabcad.com/library/classic-pumpkin-1 by mcramblet then split for printing in 2 colors. The pumpkin will need supports but the stem shouldn't.
Licensing: All my personal stuff is CC-SA. Sell it, remix it, whatever. Please give me a credit or link back, and let me see your work! I love to see the 3d printing grow in any fashion (including commercial)!
The author hasn't provided the model origin yet.