how much were lenses from Lexus? i called my local yesterday and he said that he could only get the whole assembly for about $375 each, he could not get the covers by themselves.
* I am mounting mine with just some long bolt/nut on one hole and 2 small nut/bolts on the offset hole. Then took a piece of copper pipe, flattened it, bent it into [ shape x2 pieces, drilled holes on the tabs and then bent another 2 in opposite directions at either end to get a 'Z' look which will mount with 2 small bolts on the bracket & mount sides to get it centered on the opening.*
( i had some extra time at work and these were the materials available to me + a vice/saw/drill/hammer. Way easier if you are making a trip to HomeDepot )