Repairing ice dam damage to standing seam, metal roof.

We are selling a home that has a standing seam, metal roof. The seams are approximately 2″ high and do not leak. Over the past winters in the Colorado mountains some of the seams have been bent to a 45 degree angle due to ice dams (about 5 ft of damage in a 20+ ft. roof panel). About 4 or 5 adjacent panels have this damage. Is there a tool, device or other means of straightening the seams to stand vertical again?
Replies
These will work and might have some other usefullness for you in the future:
http://www.grantlogancopper.com/tools/clamps?page=shop.product_details&flypage=flypage.tpl&product_id=578&category_id=93
Standing Seam Damage
Thanks for taking the time to reply...the vice-grips might work..