There was a best of Illusions CD, but I think it was only an international release. At least the one I have was.
I was a big fan. Even though these day I'm primarily a jazz drummer, I used to rock with the best of them back in the late 80's-early90's. I was living in LA for a short time when they started playing clubs. They had a good local fan base, but a lot of people didn't like them. Thought they were to scruffy, at a time when the glitzy hair band thing was so big. I was at a lot of their shows. They were one of the tightest bands on LA at that time. Then they got signed and the rest was history.