There are definitely a few non-companion accessible stalls that have them - mostly the newer ones at MK. I know Tangled restrooms do for sure, and I think the Gaston ones did as well.
I don't recall any of the ones in EPCOT having them. At the very least, the ones in The Land pavillion do NOT have sinks in the accessible stall, and I don't think the ones in UK, Mission Space/Test Track area, or Norway do. I also don't recall seeing them in the restrooms across from Figment. The rest of the parks, I honestly don't remember.