Please note that this design was for a custom setup, however, if you have similar circumstances this may work for you. Bracket is based around a 0.95" ledge, but if you have a thinner ledge you could easily drill and tap to add a set screw. Additionally, the branches are made to accommodate a controller with Strikeforce paddles added as well as an audio adapter...I have not checked, but they probably would hold a standard controller fine as well.

If you decide to make this, note that you will need two #4 by 3/8" long pan head machine screws for assembly.