Incase has announced that as part of its collaboration with The Andy Warhol Foundation, its Snap Case for the iPhone 4 and iPhone 4S is now available in five additional designs. Featured in this latest update are Warhol’s 1964 Self Portrait, 1963’s Crowd, Cars and Handle with Care - Glass—both from 1962—and 1980’s Diamond Dust Shoes. Each case features Warhol’s signature on the inside, and offers full access to…