You can buy a stretcher/shrinker for $143 AU, and this is a rip off country.
Probably get one for a lot less over there, do the job in 20 minutes, then have the tool to use for other jobs .
If you are making any panels, these are invaluable.
At the point the strip bends sharply at the roof belt line, scallop out a small piece behind and anneal that area and bend , it will not need welding at that small rise.
I was not able to buy the correct T strip here, and freight was impossible for an item I think is 51 inches long, so I got a length if thin metal tube and sliced in half, and after grinding, it ended up about 1/3 of its arc, and I bent this to contour, and soldered some holed locating tabs onto to mate up with the gutter bolts in rumble gutter sides.
Bit of a major job, but it was the only idea I could come with at the time to get car on road.
Visibly, it is fine.
This is a typical ebay item.
http://www.ebay.com.au/itm/Sheet-Me...=AU_Car_Parts_Accessories&hash=item51a6476c1a