Mike,
Easiest solution to this is to take the piece to a custom glass shop in your area and tell them you would like to replace it with "tinted Lexan". They should have multiple tint, color, and size options to choose from. This is how I replaced them on my 1998 IP40. You can also use this method to replace the "glass" on the Dorade boxes if ever needed, as Island Packet no longer makes them. This is BY FAR the cheapest way I have found.
Pat
S/V Elizabeth
Panama City, FL