I am looking for a primary care sales rep from Pfizer's who might be
willing to do a market research interview to help me understand
Pfizer's sales organization. We are able to pay a $75 honorarium for a
1 hour phone interview.

You are joking, right?

Very easy to find them, ask your doctor.  As an ex Pharma rep I can
tell you that they would prob not speak to you, and if they do it
would be for a substantially higher fee (try 15-30k).  Understand that
our budgets can ranges in the 100k+ and our bonuses are astronomical
(my last bonus was 135k).  $75 is less then I usually spent on parking
on a slow sunday.  My lunch budgets were between 1,500-3k per office.

Unfortunately I can't speak to you because I signed a very strict
contract when I left my formar employer. ALL of us sign such
agreements so any conversations would prob be in violation of the
pharma reps contract.  But then again, we were never known fr high
level of ethics...   Best of luck.