I am in the process of building new ones for the same reason. I should be receiving the parts later today, a 3" mandrel bent "U" pipe to make the two down-turns from and two V-band flanges. My buddy has two brand new mufflers he's not going to use, so he will weld everything together in the next few days.
3.00" Mild Steel, 6.00" Radius, 180 Degree Mandrel Bend Columbia River Mandrel Bending
My present pipes, which are chromed, were modified with V-band clamps a few years ago so I could easily switch to shorty, wide-open pipes for the track.
I believe I will paint the new ones white with "Flame-Proof" paint, I think it will look good with my paint scheme.
I'll try to get some pictures in the next few days after we start on the project.
Ralph