I think a possible reason that the pedal doesn't sound like you remember is that it may have gone through a number of revisions, even slight ones, that changed the sound. It's possible that only the certain version you had at the time sounded the way you like. I know with many pedals that have been around for some time, companies change the IC type, and component values/types for many reasons, which may change the sound some. Look at the different versions of the Boss DS-1, which has had I think five different chips in it, and players seem to like one or the other.
Good luck, I hope you can find one that sounds like your original one.