I finally found this ugly guy in Pa. (Dolla Bella) sea hare and hope he does his job. Plenty of algae for him to eat. I heard they do an outstanding job on hair algae.
Good luck. I live in SW Florida and I've collected a couple of very small sea hares from a nearby estuary. They didn't survive very long (2 to 4 weeks) in my tanks. But then I didn't have too much algae.