Re: recommendations for halyard attachment??
There absolutely are options today that didn't exist 30 years ago. Heck there are options that didn't exist five years ago.
To buy a wire to rope halyard with modern synthetics is both more expensive o. The front end, and more expensive life cycle cost than using modern line. And for the extra money the wire halyard gets you nothing beneficial. They are heavier, meat hook, rust, and have more stretch than dyneema will. All for a price premium.
Which is why no rigger I know even makes them any more. Sure there are probably a couple of shops that will, but for the most part it is a dead technology.