There are many different iphone cases on the market to pick from. For something with retro appeal, take a look at the range by Crank Cases, especially this Abbey Road case.
The case reproduces the famous sign, complete with the graffiti, and is made from felt with a special fade resistant coating on top. Other designs in their range include cases in the shape of calculators, cassette tapes, red phone boxes and even the tardis.
The case costs £13.
Buy it from All Things Original