I just received my Rokinon 8mm F/2.8 Fish-Eye Lens. Took it outdoors for the first time and lost my Front Cap. I don't know if it fell off the lens or fell out of my pocket. I have looked high and low all over the Internet with no success in finding a replacement. Anyone know where I might be able to find one? thanks in advance the cap looks exactly like this but it says Rokinon instead of Samyang. I don't mind purchasing a knock off version or even a Samyang cap.