Outlandish promo stunts for movie and TV premieres are nothing new, but 20th Century Fox has come up with a marketing idea that could be a “Homer” run.To help hype July’s “The Simpsons Movie,” the studio is working to enlist 7-Eleven to turn several of the chain’s stores into Kwik-E-Marts. The fronts of about a dozen stores would be transformed to look like the cartoon’s famed convenience store, and shoppers could pick up everything from Krusty-Os cereal and Buzz Cola to Slurpees dressed up in cups that say Squishee. The “Simpsons” treats would also be available at the chain’s other stores. No word yet on how much d’oh, er, dough the stunt will cost. But given the buzz sparked so far, the idea may have already paid for itself in free publicity. Mmmm … publicity.