I think you need the female/female hose. Not sure what size it is, but if you disconnect it from your sending unit and take it to Autozone or whevever, they should be able to hook you up.
These fuel lines are common and are not really special order. Unless the place does not have your specific length already in stock, it may be necessary to custom cut and install the connectors at the end. Prior to reinstalling, its best to use some fine grit sandpaper or steal wool to remove any corrosion on the steel lines.