My friend showed me a new optic mount for Aimpoints that he is looking to bring into the US. Trinitywing makes these in Korea. They will also make another adapter to fit the Trijicon MRO, once they get a Trijicon MRO. Estimated retail will be around $75.
You can see the lever lock mechanism and the dark gray clamp. As you close the lever, the slide clamp closes onto the rail.