Today I picked up some hydraulic parts (hoses and different adapters) at the local hydraulics shop. Honestly, much cheaper than I would have thought.
Pressure line will be 3/8" hose with 8L (M16x1.5) fittings
Return line will be 1/2" hose with 10L (M18x1.5) fittings
One of the fittings is a flat seal M16x1.5 adapter to fit the steering pump. The adapters I see on Ebay seem to replicate the hardline into the pump with an O-ring on it, but I really don't see why this adapter wouldn't work just as well.
Here a picture with the adapter separately on the pump (somewhere in the middle)
And once fitted, it look like this:
