Was Chiisana Obake Acchi, Kocchi, Socchi ever released in English?
The article that senshin found indicates that Saban Entertainment, the infamous anime mutilator and "creator" of Power Rangers, co-produced Chiisana Obake Acchi, Kocchi, Socchi, so it seems incomprehensible that they wouldn't have produced an English dub. I also found an English-dubbed video of Three Little Ghosts which I am quite sure is the show I saw. The Anime News Network page gives the three ghosts' English names as Sally, Bumper, and Cutter, which is exactly what I remember their names being in the show I saw. The ANN page doesn't list any English voice actors, but this TV Tropes page mentions that Saban and other dubbing studios around this time frequently didn't credit the voice actors, so it's possible that the compilers of the ANN page couldn't find any information on the English voice actors and decided to leave it blank.

Given all that, I'm quite satisfied that Chiisana Obake Acchi, Kocchi, Socchi was released in the US and that it was the show I saw.