Mike,
"what you see in the photo above are not yellow covers for the lights. There are only yellow bulbs inside and you will have such a setup. My rig has the same setup as the photo above when I put on my lights but use only yellow bulbs. "
Well, the Thai 80's must have been manufactured differently than the Japanese spec 80's then. Unless someone went through the trouble of cracking and taking out the yellow covers\shield that go around(cover) the regular bulbs in your fog light units. If that's the case, I apologize.
Or maybe I did not make myself very clear, which is more likely.
I meant to say that the yellow covers are for the HID fogs(or regular, ture HID's. Not HID colored(blue-tinted) halogens).
I can't remember the term they use for the them, instead of bulbs for halogen(not ignitor, not ballast, what was the term for HID unit's???). Hope this is clear enough.
You just slip them on like... (cough) condoms and put the clips on. I said that I would just put them on the CIBIE HID fogs(or other HID's) to make them more foul- weather worthy
Also, if you thought that I meant a cover that you can put on top of the headlight(fog light) cover unit, there IS one available in ion-crystal color(similar to yellow). I can't find a pic/link with it, but I have found one similar to it in clear like it:
http://www.88house.com/ca9.htm
If you scroll down there's a picture right above the snorkely on the left(put on a four square headlight conversion model). I have seen them in yellow/ion-crystal on the regular headlight model before. I have it in my catalogue, but don't have a scanner.
Or if you are bored like me

try 88 House's web catalogue(scanned; not by me though), some neato items

:
http://www.88house.com/catalog.htm
I also have seen a film that you can put on head/fog lights that is yellow at a local automobile accessories shop.
I think that the stock yellow fogs look cool, but I'm not sure if they work all that well, considering how high they are and also from what I've heard from some Japanese 80 owners.
OK, I'm tired now. I'm done rumbling.
My 2 yen's worth.
mot