will be facing this shortly but have not begun removing those lines.
It looks to me like the fittings going into the manifold are very similar to a typical banjo fitting that Ford used on their remote hydraulic valves so those may be obtainable.
The fittings that go into the manifold look like the ones I found on a 4400 steering cylinder and should have an Oring inside to make the seal. Those orings were still available from the dealer. On anything where parts are no longer available you (we) may have to get creative. Perhaps you can cut the hose crimps off and replace them with a different style hose and crimp. It may require you to silver solder a modern fitting onto the old fitting or even have a machine shop drill and tap the orifices to accept an NPT fitting.
This is only an 1100 psi system so taking some risks is acceptable.
I will be dealing with this at some point myself and am confident there is a way even if it requires some thinking outside of the box.
It may be springtime before I dig into mine though.
You can email me using the "send email" at the bottom of this post if you would like to collaborate on this.