Another possible solution...
There are many places, online, and I'm sure local to you, that will provide stainless tubing in the diameter that you need. Use it for the straight runs. You can ask your local auto parts store (I went to NAPA) to look at all of their radiator hoses. Pick ones that give you the correct bends to create the proper path between the radiator and the thermostat. In my case I actually found a local welder that created much of the path in all stainless. There are tubing crimpers that will create a bead so the hose doesn't release from the tubing under pressure. If this interests you, there are some more details to help you down this path.
There are many places, online, and I'm sure local to you, that will provide stainless tubing in the diameter that you need. Use it for the straight runs. You can ask your local auto parts store (I went to NAPA) to look at all of their radiator hoses. Pick ones that give you the correct bends to create the proper path between the radiator and the thermostat. In my case I actually found a local welder that created much of the path in all stainless. There are tubing crimpers that will create a bead so the hose doesn't release from the tubing under pressure. If this interests you, there are some more details to help you down this path.
