I know this probably sounds really stupid...but, I recently purchased an '82 380SL. The previous owner replaced the wiper blades with a pair of black Ancos. I'd like to install silver blades as close as possible to the originals. I see left wipers and right wipers. Left in stock, sold individually (around $24 ea.). Right, out of stock, sold in pairs (out of stock, no price). And I've see a pair (about $73). All are 19". What's the difference between the right and the left? Can I use 2 lefts? (About a $25 savings.) All Bosch. Web sites say all will fit my car!