OK so these aren't perfect, for some reason one of my LEDs went out :( going to have to deal with that. So, all of these pictures are without the trim piece there and with only one LED.
Tyco light pipe (GM light pipe)
40" flexible light pipe
35" rigid light pipe
35" rigid light pipe with the trim piece
IMO the rigid 35" light pipe is the best. It has weird marks on the back that keep the light from dimming as it gets further down.
Edit: The pictures are poop because I was using the facetime camera on my iphone. I'll hop in the backseat later and take them with the actual camera.