Where to get pre bent exhaust pipes and any suggestions on how to swage them to fit over mufflers?

You know the 67s have to route the tail pipes to clear the gas tank strap. Right?
And AFAIK 67 used a different tail pipe hanger than 68-9, ones off the side of the rail and one is off the bottom. I could be wrong about that. But you may want to look it that over so you know where they will be coming out under the valence.
And TTI doesn't use the factory muffler hangers or locations. They hang off the seatbelt bolts. So muffler angles and position are a few inches over. It looks like the TTI tailpipes can be cut and rewelded but that project is in my 'round too it pile.