You could make your own. It would require only basic sheet metal skills. First, remove the old ones and clean up the surface. Then get a sheet metal shop to fold you a piece a bit longer than you need. It will be similar to a Z shape cross section. Then carefully curve to the shape of the door opening. You can do this using heat, or a tool called a shrinker/stretcher. Care will be needed. When the piece fits,trim to length. The innermost edge of the Z may need trimming slightly. Then stitch weld into place using short welds about 5/8" long along inner edge. Mine turned out very well.
