I have a 1996 221 Elite. I needed that piece too but couldn't find one. Ended up making a piece from 1/8" aluminum plate. It is soft and easy to machine and form. I used simple tools to work it; like drill press and files and hacksaw. When final shaped, I polished the plate then "engine turned" the aluminum surface.

It turned out beautifully. Everyone who has seen it has really liked it. I liked the look so much that I made a round drain cover for the cockpit. Drilled, polished and turned like the other.