Turkey legs are available in all the parks for a CS credit (you get the leg, a beverage and a dessert OR a bag of chips - some of the places don't offer desserts)
MK - Lunching Pad has them
DHS - Toluca Legs Turkey
Epcot - Fife & Drum Tavern
AK - Trilo-Bites
And yes, the pork shank counts as a CS entree.
Thanks Nala, do you know if we get a side and a dessert choice at Gaston's?