Fuel Line

I have a 1984 Gpz 1100 currently running on carburetors. Will attempt to change back to the original fuel injection. So my question concerns a pre molded fuel line that runs between the fuel pump and fuel filter part # 92059C. It"s 3/8 dia on the pump side and narrows down to 5/16 on the filter side.No longer available from usual parts sources.Does any one know of a substitute for this hose. Thank you. Jeff

You could use a steel reducer hose connector:

Thanks i guess that's my only reasonable option. Jeggs carries the reducer ordered it today. Jeff