I'd try some nuts to see how far they thread down. If I remember correctly, the nuts don't thread on too many turns and would probably be tight before they get to the bends. You can always add a few washers to assure that the nuts don't get to the bend too. I would be hesitant to bending them back for fear of cracking the fiberglass, just as Obeisance stated!my car didn't come with a roll bar cover, so i bought one used. the part that i purchased has bent studs (not quite so severe as yours).
the bent studs are hard to see in pictures in my other thread:
i tried applying some force to bend the studs back, but gave up before breaking the fiberglass bond; i was not able to bend the part back to straight.
in spite of this the stud still fits through the clam mount hole. when i have the roll bar cover installed, i don't put nuts on to those studs. the cover seems to stay in place well enough.