Time to start calling your local large-equipment shops/dealers or old timey farm stores to track down a hydraulics shop. My CAT dealer stocks some of this stuff and can make up hoses, for example.
The old valve should be easily rebuildable; most of the parts (o-rings and the like) are pretty standard sizes. However if the valve cylinders are scored, you may be out of luck.
The new valve: You'll need the hydraulics shop to find fittings to fit the holes on the new valve to your existing hoses and/or make up new hoses that fit the loader lines on one end and your new valve's holes on the other end.
The BYO/PB hole may be the most challenging as that fitting 'enables' the Power Beyond feature and needs to fit correctly. BTW, the PB hole was capped on the new valve, making the valve a closed-center, which you DON'T want.
The more aggravating issue (to me) is that the spool valve stems on the old valve have 'female' clevises and the new valve has 'male'. Have you figured out how to hook your control handle to the new valves? Your hydro shop may be able to move the old valve stems to the new body and get it all working.
I didn't see any manufacturer's marks or part numbers. Model BA - 2 Spool Parts | Cross Mfg.
is probably a pretty good representation of what the innards look like.
Don't bother trying to replace the 'clear' plastic hose protectors if you get new hoses. I doubt you'll wear out the hoses before the tractor is scrap.