Dennis,
No I don't. It may be possible to advertise & swap the express sights for a standard FA rear sight - either FG or PG - though. Just make sure that the square notch rear you're trading for is for an 83 and not a 97.
You can also contact FA for a current sight assembly. After all these years, I doubt that they would have a Ruger adapter still available in the shop, but who knows? The Ruger sights themselves are, of course readily available on the used or new market. If you find an adapter, I'll give you a Ruger sight.