I may be wrong - but it seems like we got churros once in Liberty Square in the Magic Kingdom. We were waiting for a parade and someone walked down past LTT to a cart and got them. In DS - it seems like I remember there being a cart between RNR & ToT this last trip. I may be wrong about that - but that is what I'm thinking. Don't know where they are in AK, and they are in Mexico in Epcot.
HTH