www.monoprice.com
They have the best prices around and sell HDMI 1.3 certified cables. They have a really good deal on their 20ft cable if that's enough length. Their 25ft HDMI 1.3 certified cable is less expensive than Blue Jean's BJC Series-2 HDMI (non certified).
Blue Jean's certified cables are pretty nice though. Sliver plated conductors is a nice feature.