Welcome, @danfree, glad you found TheCarverSite!
You'll want to reach out to @sea, a member here, who does ribbon repair. Bob Carver has authorized and approved his technique and materials.
Taking apart the ribbon is not a DIY task, it will never get put back together without the proper jig as the magnets will not position properly.
Sorry to break it to you, but you will likely have to spend some money if you want to hear these in all their glory. Working, they sell in the $750+ range, fully restored with fully restored ribbons in both speakers, they can go for much more. But it takes investment.
One thing you might do, is watch for a ribbon on Ebay, from a set that someone is parting out.
Still, hang around here, and let us know what you do next.
Glad you found us.