Here's some photo's of how I've spent the last day or so out in the shop. The panel had to be hand formed due to lack of availability. The rockers on a 122 are 18 gauge (about twice as thick as the sheet metal they sell at Crappy Tire - which is how I end up with forearms like Popeye...well my right forearm and shoulder are in pretty good shape).
Start by creating a positive form out of wood that perfectly fits the test panel (from Olof)...in this case a regular old 2X4 was used, then sandwich the metal between the form and another length of wood. Clamp it very tight with lots of clamps and then proceed with beating the hell out of the metal - only kidding

. I use a urethane hammer for shrinking and a metal hammer for stretching (you have to figure out where things get shrunk or stretched). This takes lots of practice to get the hang of it, so to some it is voodoo, it's not - but it isn't easy either.
After several hours of massaging the metal you end up with this...a complete panel for about $5. Factory replacement is on the right - mine is on the left. If you look really closely, you can see the grain of the wood in the hand-formed part.
Here's an overview.
Time for a well-earned beer.