Thanks all, for the comments, links etc -- I've gotten several replies from the people in this group via email.
My KSU should be here tomorrow ... and the phones to follow shortly.
There is a bunch of the 25 pair cable up in the attic of the building I work in; I even found one with a female connector on one end.
Now I'm shopping for a good punchdown tool. Looks like it's going to be the most expensive part of this whole endeaveor (Phone: $45. KSU: $55. Punchdown tool: $65 - 75).
Ah well, thats life.