Adam, the current TFC-Shield is now available online for ordering. It can be connected to the Qorivva MPC560xB board. All the schematics for the connectivity are available (see Thread above).
The boards are no longer manufactured but all the schematics are available to create your own. Link on the Freescale Community's Freescale Knowledge Database at Freescale Cup Motor Driver Board
The H-Bridge MC33931 is available for free sampling on our Freescale.com site at MC33931 Product Summary Page