I do remember that strip, but I don't think I have the book it was in. I only have about have the Bloom County books and even less of the ones for Outland. Comic strip books usually have a finite shelf life, and Bloom County is partially topical humor, which makes its lifespan even shorter. Breathed has an official website that suggests that most of the titles are Amazon available.
Bloom County is one of the two strips whose content style I've ripped off, the other being the one Bloom County started by ripping off, Doonesbury.