I am doing research on supply chains.  I neeed a list of the fortune
500 with the number of suppliers each company has.  This will be used
to do market quantification. Preferably XLS format.

This may be very hard to impossible to find,
unless someone else already did it and
published it.  Example, I know I worked in
Supply Chain and analyzed Best Practices
from large firms.  Some of the firms in the
Fortune 500 'had' 10s of thousands of suppliers,
and now have 1000s.  They include florists, to
steel companies and indepedent consultants.
Curious to see if you get an answer, and also
call someone at NAPM or APICS to get ideas.