They make a 5/8(m) > 5/8(f). It's made of metal and it fits the A20S/AMS22 snugly. It extends the bottom of the schoeps mount with a metal piece with threads, instead of using the plastic threads on the mount. So from that day forward you never unscrew at the schoeps mount, but at the metal piece.
I bought mine at showcase in atlanta, I'm sure any photo/video store has it available, or can be ordered. Mine is silver/chrome.