Here is where she could start looking:

http://www.akc.org/breederinfo/breeder_search.cfm

A breed club is the best place to find a referral to a responsible breeder.

This link will help weed out the good from the bad breeders:

http://www.geocities.com/Petsburgh/Fair/1901/chart.html

And if she chose to go the rescue route, tell her to check the shelters, breed specific rescues or:

www.petfinder.com

If there is a Pug in need of a home in her town she should be able to find one on Petfinder. If she has a busy life or no patience for a puppy(house breaking, chewing) then I highly suggest adopting an adult Pug who's temperament is already set so there are no surprises like with a puppy and all medical work (spay/neuter, vaccinations, etc) will be done.