Spensors (not available online- http://www.spensors.com/) sells one similar to the one at Amazon that comes with a detachable blue and red cover on it. I haven't installed it yet but for $20 for both I figured I could make it work.
Were you able to get this to work? I have a similar issue with my lethal weapon 3 and I purchased the same thing and am just curious if you figured out how to wire it up.