Well, MY dealer for MicroChip data sheets is J.L Montgomery Associates
Voice:(810-489-0099), Fax (810-489-0189)  (These are US #s, BTW).  I asked
them about the 16C84 serial programming spec sheet (not included in the
databook) and got it two days later.  They seem to have a strong helping
policy for students, and I like their attitude so far.  I live fairly close
to them, so I don't know if they have a distance limit.  But it can't hurt to
fax them with your request.