Randy,
There is Webb Cam on 12th just south of Vine (across the street from the pay parking lot on 12th st.)
John, Jack and Matt run the place and I hope are doing well. They are the last bastion and I've been shopping with them since my old branch of Jack's Cameras went out of business back in 2009. Philadelphia really needs an independently owned photography supply store and even 10 years ago there were a bunch in addition to the Ritz and Calumet locations.
John doesn't have the biggest selection of chemistry and paper but he can get stuff for you if you need.
It seems like Temple U. and CCP have helped keep them open since I often see college kids in there buying paper and film. I'm going to have to go by next week and buy a few jugs, a liter of HC-110, some fixer and photoflo.
As for Calumet, it's sad because I loved having a source of seamless paper rolls nearby.
Phil Forrest