01 a6 quattro 2.7T Tail light, fog light, and side marker light question.
 

I have recently upgraded headlights that are DOT/SAE certified and I been trying to find smoked out tail lights for my 01 A6 Quattro 2.7T base model have only found a few sites and those sites say out of stock anyone know where to find some? And also are there any that are SAE/DOT certified so that I wouldn't have to worry about any legal action from law enforcement.

Also trying to find the same thing about the side markers all the ones I'm finding don't say DOT or SAE.

As for the fog lights I think I'm going to stick with the same kind just a newer pair but I was curious if the colored ones I see people have on there cars is that legal? I thought its the difference in the bulb sizes as in 5000k 6000k etc. Please if anyone got any answers let me know. Thank you.