I bought the Cravenspeed iPhone 4 mount. I ended up using a different adapter and no longer have a use for the arm. I am selling the mount for the iPhone 4 for $25 shipped. PM me for info. This will mount to the Cravenspeed Z-Bracket for sure.
That module will fit on any of our FlexPod Brackets. Normally sells for almost $40, sounds like a good deal.