Most of the landing gear switches are nothing more than a HD DPDT (30 amp, double pole double throw) switch available at Radio Shack, Home Depot etc.
I would just fabricate a mounting bracket to be mounted in the drivers side storage compartment closest to the front. Then wire it in parallel to the factory mounted one. That way you will be able to operate the landing gear from either side.
2005 Dodge, 2500, auto, 2wd. Pac brake PRXB. CB, Max Brake Brake Controller, Rhino Lining, Aero 60 gal. replacement tank.
1998 Hitchhiker ll, mod#31RLBGBW, RBW L'tl Rocker Hitch, Generac NP50 G generator