Left or right usually show up on eBay and go for cheap because it's not a pair. Keep an eye out there in case a forum member doesn't have one for sale for you.
Single units (right or left) are kinda rare. It could take a while.
This reminds me that I have been meaning to use black zip ties on mine to ensure they don't blow away or are stolen when the top is down and I'm temporarily away from the car.