I'd go the hardware store route, if possible.
Find a 5/56" Allen wrench, remove your clip, put only the flat surface with the clip screw hole in either a non-marring wooden crack (as suggested above), or take some electrical tape in with you, wrap the flat screw-hole surface to prevent marring, chuck it up in a display vise or a set of vice grips, and bend your clip forward (back into shape) putting the pressure between the "chucked-up" surface and the indentation in the middle of the clip. Any further forward pressure on your clip and it will buckle as you bend it and develop a funky, humped shape. You want the "bending back into shape" to occur primarily at the point between the flat screw-hole surface and the indentation. Done this several times myself and it works like a chaaaaaaaaaaaaarm.
Professor.