i have been looking for a replacement set of front fender emblems for my half-ton and found/won 2 different sets on eBay that are both in excellent condition (just have to redo the paint). one set looks 'factory' and consists of 2 pieces per side with the 'Chevrolet' separate from the '3100'. The other set has just a long, one-piece, emblem for each side with the 'Chevrolet' and the '3100' joined together.

what's the story here? Are the one-piecers aftermarket?