This is the Fuel Injection Hose that is viton lined
Fuel Injection Hose SAE J30R9 or 30R90
(SAE 30R9 is a medium pressure, low permeation fuel injection hose recommended for gasoline, ethanol, sour gas,diesel and BIODIESEL fuels. It's FKM fluoroelastomer tube provides excellent chemical resistance and exceptional permeation properties to meet the latest EPA and CARB emmissions requirements.)
http://www.goodyearep.com/BuLandingPage.aspx?id=17700&terms=fuel+injection+hose
The Fuel Inlet and Fuel Outlet hoses can be replaced with ID 5/16 hose. The Plastic Hoses can be replaced with size 1/4 inch ID hose.
The The Injector Fuel Return hoses I believe Frypower has a decent price on them.