You could make up a makeshift one yourself if your rings are like all the others I've seen or owned.It should already be threaded with the standard camera 1/4" thread. Just screw in a countersunk screw from the underside of the ring and tighten it firmly. You could either cut the bolt to the length that
ends up with it nipped up when the camera is facing forward, or use a nut
which you nip up when the camera is facing in the direction you want.
raymo
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