Mine are not amber but they make some type of amber lens cover for them.
I doubt you could go wrong with PIAA or other major companies on the fogs.
I had to cut the plastic valance to get the Tangos to fit and there were no PIAAs that would fit otherwise (this was before the metal valance came out).
It's pretty easy to modify the plastic to accomodate up to a little over a 5" diameter light but PIAA makes the 510 ion crystal which might be the best option for you.
http://www.suvxccessory.com/xccessory/piasu-5161.html