I've seen a couple of RB B's with the bumpers painted to match the body. I really liked the looks of those. If I were buying a B, that's what I'd get, with the engine modded for better performance.
A nearby Brtish car shop (British Miles) has a late LE with a Rover (or might be a Buick) V8 conversion. Looks bone stock until you open the bonnet. Very nice.