Compufab has developed The Universal Stiffener™, an aluminum bar which can function as a mechanical PCB stiffener, a heat transfer device or an electrical bus bar.  The Universal Stiffener™ fastens to a PCB with machine screws or rivets anywhere along the length of the bar.  The Universal Stiffener™ is a lower cost alternative to machined fiberglass or machined metal PCB stiffeners.