[ApacheNick]

I would try to repair it first. You'll need to pull the seat and gas tank but you will have ok access to the back side of most of that for hammer dolly work. Some of the higher up damage wont be fun but it should be doable. That's a ugly piece to replace...

Some may disagree with this, but for that spot a cross chisel hammer and a pick hammer will be your friends for getting the body lines back. Which ever dolly you use should match the factory curves of the panel as closely as possible.I would use a general purpose body hammer with a flat or slightly domed face to start with.

Hope this helps.