Who's car is it?
I've looked at 2 in the past 2 weeks, looked over a bunch of pics of the World Challenge cars in 2005 (new body), VRL cars in 2004 and 2005, new cars as delivered by Viper Race Headquarters, and none of them have clear foglight covers.
I found a picture of Tommy Archer's 2004 car at Road America with solid BLACK covers riveted to the fascia.
I would suggest you contact the owner of the car who has them installed - but it does not appear to be 1) a stock item or 2) a new World Challenge item.
Where's the pic?