Re: Rusty already
KM stuff is very good by all accounts I've seen. I don't know anything about the tri-metal but hookah-life.com, PYH and sphinxhookah.com all have excellent KM products that I know from experience and any of them would be a good source for such a rig. I personally have had great experiences buying from Hookah Company but i've heard a lot of negative reports from people that have bought narghiles from them so...
In terms of sources for Syrians I can strongly recommend my friend Jimmy from J & R for both first rate products and service. I can also strongly recommend Arabica Sous and furat hookahs.
You should look over all those sites before making a choice.