IF you like the yellow look of the Hellas you can actually purchase colored films to go over the lenses to change them to whatever color you wish. This is what I did with my 500FFs and after 2yrs they have not caused any issues, and no chips, dings, scratches that I have noticed in the films.
these are Cibie 175 fog lights, the color is in the glass itself. VERY wide beam, super quality.
I do prefer the look round regardless of the mode(however a 62 can take rectangular OK) but its getting hard to find Oscar Plus with amber lens anymore, so these were a good option at $125 for a new pair(now they are $150-175)
these are JDM OEM Kioko on the wifes 62, my guess is from a Surf or maybe a 80 series. I like them better without the covers but my wife likes the Toyota covers so