Steven, Welcome to the Club!
How long have you been playing bass? Good luck in your search. Here are a few tips- look in the For Sale section of the Club, here- people are always selling and trading Alembics, there, which is how I ended up with my dream bass- a Series II Six String Bass!!!
Another suggestion is ebay, bass central, planet bass, and Alembic themselves- you never know what they might have, hanging around in the shop!
Most likely, you're not going to be able to score a Stanley Clarke model for very cheap, but you probably could score a Distillate (very like a SC model in shape, scale, basic features) for far less (unless it's a super custom Distillate!).
Also there are Persuaders, Spoilers, Epics, Orions, Essences, and tons of other good used Alembics out there.
Here's another thing to check out that might help in your search- it's called site mash, for Craig's List, and will allow you to search the entire USA & Canada far more quickly:
http://www2.jaxed.com/cgi-bin/mash.cgi?cat=mus&itm=alembic&loc=XCA&fil=&ys=&ye=&ps=&pe=&pgs=50&submit=++++go++++ Good luck in your search, and let us all know your progress, from time to time!!!
Peace;)
Frank
ps- check out my dream Alembic in the Showcase section under Series II, Otisduo 95 9100 Six String