All it needs is spokes?! Replace them! Re-lace the wheel. Or, have a shop do it. Any bike shop can do it. Or, you can do it yourself. There is a tutorial thread here, and also instructions on the late great Sheldon Brown's website.
https://www.sheldonbrown.com/wheelbuild.html There is nothing magic about another whole wheel. I was expecting you had a bent or rusted out rim or maybe a whole wheel that had been changed for a non-matching one. The whole looks really nice, wheels too. Broken spokes were probably too loose, and broke from fatigue.
If you want to be strictly authentic, there are people on this board who can supply new-old-stock galvanized double-butted spokes like Schwinn used, but I would get modern spokes. They are stainless now, and are much stronger. You can still get double butted too. They don't look quite the same, but you'll never know unless you get your eyeball down there. Best of all they don't tarnish like the old ones.
If it's a whole wheel or two you want though, you could put an ad in the classifieds here. Someone here is bound to have wheels like that, although matching date codes might be tougher. Good luck whichever way you go. Welcome to the CABE!