I actually had a spare s54 tranny that just passed 100,000 miles from my old NA clip and sold it off late 2005 to Kpmashi. I think I sold it for something like $100 or something cheap. If I still had it, you could have taken it.
How does the clutch pedal feel when you press it? Like tred mentioned the slave could have gone out, there could be air in the lines etc.