Here is a viable solution that I discovered on the internet. The manufacturer is Rokelb and they call their product DryFlekt Molded Kick-Out Diverters.
This product is "molded from Industry-approved polypropylene copolymers. Durable 'no break ' formula with state- of-the-art UV and heat stabilizers added." This means that there is a no-goof factor in this product. Instead of having to be skilled and bending metal stock, the DryFlekt is easily installed as evidenced by the spec drawing to the right.
DryFlekt also offers a great 3D visual treat on their website that shows off their kick-out flashing. For more information please visit www.dryflekt.com or email Bob Givens directly at BobGivens@aol.com.