glad you found one, reminds me i have to change my website, the switch that i have been using is no longer available through them, they have a new more expensive strain gauge switch now.
do you have an ecu flasher already? its not as simple as hooking 2 wires into the gps, if you do that you will short circuit the gps circuit and probably cook that part of the ecu. also depends on if you are using standard or reverse shift pattern. if using standard pattern (push type) brown wire is NOT used, if using reverse shift pattern (pull type) the blue wire isn't used.