Cobra rear question??

Hey guys, I have a cobra rear bumper and the middle part is sagging down in between the muffler slots at the bottom of the bumper next to where the tails exit , I was wondering where I could find a rear bumper support for the cobra rear. The square gt supports wouldnt work so I took them off, if there isnt a support is there anything I can do to pull it up like maybe use a heat gun and hold it up, like to help reform the bumper.
 
Weird, mine did the same cause the metal bar they put in the polyeurethane got water to it and rotted, I was thinking of like epoxying another bar to the bumper and trying to do straighten it out that way but I decided to just get a new one instead.