elbow

I'm toying with the idea of making my own downpipes vs spending a small fortune on a ready made set. I can easily find tubing + elbows, cats, etc., but I haven't been able to find a source for the elbows that come off of the turbos. These look to be cast stainless (maybe Inconel). Any ideas?

Hey everyone, I've had a small coolant leak for about a month now. It doesn't leak on the driveway but I can see it running down the side of the engine on the passenger side. It leaks right below the alternator. The shop that I usually go to says that there's a plastic elbow that's leaking. They...