produces a complete 3.0" setup. I'm not looking for it personally: I built my entire exhaust and am happy with it, but I have no intentions of delving into exhaust component production/sales. There just doesn't seem to be many options for a complete 3.0" setup from the turbo to the muffler tip. Most focus needs to be placed on the turbine flange -> downpipe interface where it is well known to develop cracks, folowed by smoother transitions with larger radius bends. And of course, flex-bellows are a requirement.
I'm going to be focusing my attention soon on development of the intake manifold design I have posted here not too long ago. Good luck to you on whatever you choose to do though.