Are you trying to find factory gauges? There are many manufacturers of marine-grade gauges out there; except for the speedometers they aren't fundamentally different from auto gauges. Look at Autometer, Faria, Teleflex, Livorsi and many more.
If you don't have speed control, PerfectPass displays have a speedometer built in so you could replace one or both with that.
2007 X2 - "The Sun Squirrel"
2000 PS195 - Sold