Lebo, I'm not sure you can go with the amber sides (for the rear). I wanted to do the same thing and when i talked to radaitz, they said becuase we run turn/brake/tail lights in the 2 signals they didn' think it would work.
I ended up doing what marco was suggesting, 13 inch clear tubing on the rear fender. Thw full 12 inches or so light up with the normal running lights, then split down the middle for the turns. They actually wired it up for me to my specifiacations. Looks really trick......only problem is that they're DOT.