I got a huge bag full of extra ones I no longer need. The best ones are by a brand called Clampco, you see them on most quality turbo kits. Those are the ones I've got. I've got 2", 2.25, 2.5 and 3"
'02 C32 AMG / '07 C280 / '07 CLS550 / '15 JKU Rubicon