All the clamps on my car is from Hydro Air except the one from the turbo to the V4 (from CAS). I noticed in all of the clamps from Hydro Air has a kink in the middle. I think the one with the spring on the clamp is the better one from the heavy duty clamps.
Check out Johnsperformance, I think he has a complete kit for have the price per/clamp when purchased seperate. John's also offer USPS service so the shipping would be pretty cheap.