I can help w Metric Hoses & Fittings.
You do NOT need to go through the expense of Aeroquip lines when it appears these fittings are Low-Pressure.
The common Fuel & Oil Hose for Porsche are 7.5mm ID and 9.5mm ID. If the ones on there now are 3/8 then the original was most likely 7.5mm.
To fit the Metric threads you will have to buy adapters to Aeroquip and are going to a lot of expense for such a simple task to repair.
The corresponding thread size for a 7.5mm Hose is M14x1.25.....
Len dot Cummings at verizon dot net