He is a single driver fanatic, and has built all sorts of stuff. He is selling these drivers (with plans for the horn that are free off the web anyway) for $40 a pair. Just to clarify, I have no commerical interest in this whatsoever, hence am posting it here and not in the SWAP forum.

Drop him a line. He is a nice guy.

My DBX crossover model is: DBX 234. It was made in 1999. Not sure if DBX makes it today. It's an analog stereo 3 way crossover. Other companies that make these are ART, Behringer, etc etc. IF you awant to spend more bucks, get a Rane. DBX is good middle of the pack.
Hope this helps!
-akhilesh