If you need to use the left-hand grip to fire the shutter electronically, then the grip shown by Marc B. is your only solution. I've also been using the grips designed for the RB67 which use a mechanical linkage to physically depress the shutter button. The beauty of these (there are about 4 variants) is that they offer more variety and are usually much cheaper. If your use the RZ67 outdoors with a plain or AE prism finder you can also get a pistol grip which makes using the RZ at eye level much easier with all but the largest/heaviest lenses.