Here we are about 4 years later, things sometimes work slow around home.
This summer put in a new head pipe. The one I found was a non turbo head pipe. It fit the TD Jetta okay, except for where it joins, it was straight wall instead of flared. making it too small. I had some 1/8th steel that I shaped as a 2 part shim and everything is well clamped. I used 2" muffler clamps reversed to remove the spring clamps. I think 1.75" clamps might work well but had the 2".
I hated to weld it as at least once in the past, I needed to take it off to replace the shifter ball.