optical/electrical g.703<>bellcore GR-253 IR

Has anyone managed to play with interfacing an electrical-only
(g.703 coax) ADM with a Cisco POS line card (LC-4OC3/POS-SM ideally)
to be able to recommend a converter box?

I've looked for this in that past and apparently its not an easy
thing to come by, I ended up buying them an optical trib card for
the ADM.