Working with Dynamixel servos, there a a few options for boards. One of them is the Arbotix series. The cheaper and more common one is the original Arbotix board but this one is the ARBOTIX - M board which I could not find a mount for.

The holes are slightly misaligned to the hole but can be easily threaded or cut away with a drill. There is a small semicircular cut which is used to take the board out if needed. For me it was a pretty nice friction fit and I would rather mount the piece to my robot than to the board.