Just sharing what I found as Im in the process of designing Phase II of my panel upgrade. Love the entrepreneurial spirit at the 'other site' creating a SMART GLIDE button to compete with Garmin's ridiculously high-priced switch. The option I found fits my preferences better and is much cheaper. Local engraving shop will customise it with text for <$10.
George, Sorry for the delay. Carling Tech makes the switch in multiple finishes and multi-colored LED backlighting. The LEDs have to be dimmed with PWM (pulse width modulation) instead of a standard rheostat, but its an easy add.