i have those reverse gauges. ordered them from procarparts.com
i love them, but they are not as user friendly as i had hoped. first off, the location of all the wires coming off the actual overlays sucks!! you have to dremel the case around your cluster just to get the wires to fit decently without pinching the wires. my biggest trouble was gettin the gauges to lay flat. i tried so many different things. if there was a "CEG Rip your Dash Apart" contest, i bet i'd do pretty good. i think i've had my cluster out about 15 times. i originally had the switch down near my knees, but wanted something cleaner. i loved the blue, and never ever used green, so i decided to do this:

was kinda a pain in the butt, but i really like it. good luck with your decision!