you're right! same company!! (same address!) funny.
I forget which one I ordered thru (can check when I get home from work),
But they come as a set, one CW+one CCW
similar to the extra set that comes with the Phantom, but in black.
at that price, you'll probably want to buy a few sets, just in case.
I imagine most other DJI sellers might also have the black ones in stock.