Eastern Mountain Sports on Chestnut or Walnut St. on campus usually carries 32 oz. cans of MSR "Superfuel," which is what MSR is calling the sutff these days. It may also carry "Camp Fuel," which is the same thing (and cheaper), in 32 oz. cans.
Last time I was there, I. Godlberg's on 13th & Chestnut had the 32 oz. Superfuel. I have also seem the Camp Fuel brand there.