I made the mistake and got cheap V-Band clamps from DSRTurbo a year or two ago.
When i go my exhaust made up i had a higher quality unit put on because one brand new unit had failed before the job had finished!
The replacement clamp is very nice but because i have 3 joins, I need two more clamps.
Where in NZ can i get just the clamp from? It's a R. G. Rays (Norma) clamp, 446397-364
Here are some reference pics.