yep. . in the link posted by I&C

If you'd like anything in particular just ask, though in that link he posted there is a shot of the mount that shows you it's layout pretty good, you could probably use that photo as a blueprint for your home made mount if you wanted though unless you have a band saw that's going to be a tough job. I made one with an xacto and xacto saw. . . wasn't pretty. If you do want to make that into a blueprint note that the rails are each 6mm thick, size it accordignly and you can print out a scale plan to cut by.