I've just straightened or moved them with needle nosed pliers, they are pretty malleable. It would make sense if they are over bent or twisted oto heat them. The other thing i've seen is when they are rusted, they break, not sure heating would help in the rusted condition. i don't know about sourcing red foam. It has to be available since Yamiya is selling it.
Greenjeans, somehow i've managed to not 'catch' your name.....
Could you post your name so we know who you are ?
pm me about the red foam.