Old thread I guess, but:
I have a Cortez Bass that I've had since 1989. The body is three piece Alder or Swamp Ash with a natural finish. It used to have a maple neck that played really well until I attempted to pull the fingerboard to make a truss-rod repair. The repair was not to correct a defect -- some idiot snapped the adjustment head off, leaving the truss rod unusable and buzzy. This was before I knew what I was doing and ended up wrecking the neck. Lately I've had a need for a bass guitar (I'm primarily a six-string guy) so I'm looking into replacement necks. I'll probably also replace the pickguard with a piece of walnut. The pickups on mine look exactly like a P-Bass with a phase tap. As I recall, they are very clear sounding pickups. A previous owner installed a Badass Bridge on the instrument.
If you run across one of these -- not the plywood thing that Planet Boulder is referring to -- check it out. This is a really nice guitar and I've had other Cortez guitars that are very playable, sound great, and are well worth owning.