The actual latch for the arms is made from a modified GM Blazer factory swing out spare carrier latch. These latches were fairly expensive, but looked like they would work well for me. I also used two rubber bumper devices per side from this carrier to put tension on the latch when closed. The handle that I fashioned is made from an implement pin and rides on nylon bushings in the swing arms. This handle is bolted to a lever sandwiched within the swing arm.
Rods attach the lever to the latch on one end and the pin on the other end.
Finally, the latch closes on a pin welded to the bumper via two tabs. I placed it there because I felt that the area of the rear window that got blocked would be directly behind my head, which is a fairly dead area anyway. It mounts the tire high enough to clear on departure angle and slightly angled to look aesthetically pleasing. A CB antenna mount was added to place a whip in a protected location although probably not the best RF location. Also, a proper paint job or powder coating is definitely needed.