Where can I buy a unique iPhone 4S case in Philadelphia?

I'm looking for an iphone case with a bumper, and I want one that is more unique than the ones on the online apple store. Where in philadelphia could I get such cases? Under $35.

Added (1). To the first response--- it doesn't have to be custom, i just want it to be a cool design… The ones at the apple store are all quite plain

Custom iphone cases will cost more than $60

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