I went back to the drawing board and came up with this.
http://s1074.photobucket.com/user/wh...tml?sort=6&o=3
http://s1074.photobucket.com/user/wh...tml?sort=6&o=4
I know the top bracket will work, I have a template made out of wood. I wanted some more support, so I came up with the bottom piece. The top will bolt to the backside of spindle and the bottom will bolt to the front side. I'll have to come up with a spacer block to join the two, either by bolting them together or welding them.