Welcome aboard Turbocorrado!!!
You're probably looking at an aftermarket replacement wheel.
Tonneau cover will be handled by a local marine canvas guy. There are no stock canvas items, this is an industry standard to have custom canvas work.
Gauges are Faria. They have a limited lifetime warranty, however that is for functionality, not cosmetic appearance. The panel they are mounted on will be a tough find. Probably easier to fabricate a aluminum replacement and have a wrap with a pattern of our choice to cover it.
Boating; The act of spending large amounts of time rushing around like crazy, in order to sit around doing nothing.