Windshield:
If it is the "walk thru" windshields on most FS boats, try a local glass shop. If it is the plexi-glass type, google Custom Mold and Tint.
Owner's Manual:
You'd be hard pressed to find an "owner's manual" for a boat almost 20 years old, and if you did, it wouldn't tell you anything that you don't already know about the boat. They are all generic.