No idea if the ad is still current, but front pairs advertised here;
https://xwebforums.com/forum/i...lo-fog-lights.40215/
There are different styles from Carello, the ones used on De Tomaso fit in the opening on the GT5 air dam, I don't think what Larry linked are the correct style or maybe they are missing housings?
There area few sets listed on eBay, many listed as Lamborghini with a Lambo appropriate price tag! I think most came with the yellow lens.
Julian