The pressure is regulated by the fuel pressue regulator, not the pump. Pretty much any pump on the market should be able to supply enough for the fpr to keep the pressure stock.
Like Chris mentioned, Aeromotive makes one, HKS makes one, and Sard makes one. You can order these from any HKS, Sard vendor. Just do a google search and you'll find plenty of shops that have them-just take some time to compare prices to find the best one..