The Guinea Pig Zone - Where the Passionate Piggy People Go!
Product Sign Supplies Hot
625 Emory Street
San Jose, California 95110
Good selection, decent prices
This has been one the places where I've purchased my Coroplast over the years. If you are looking for a particular color, best to call ahead and see what they have in stock. But, they always have sheets of Coro available! They are a wholesaler, but also sell retail.