Local Specasavers (Ringwood) did mine. I had a lens made for pistol and put into a pair of shooting frames and I gave them an old pair of distance glasses and asked them to blank out the left lens and put a lens in for the right eye with a longer focal length so I could see the foresight on a rifle. They allowed me to take in a pistol and a rifle to get things spot on. The optometrist (female) seemed very interested in the whole thing.