Motovox 80

I have a motovox 80. I put a honda gc160 5hp on it. I am in search of a complete exhaust for it to replace my homemade one. The ones I have seen on online vendors don't have the bends I need. I can either go back along the motor (tradition style, parallel to the ground) or out and straight down then back under the frame. I have included a youtube short to better describe my set up.
Does anyone know where I can purchase a pipe? Or even an exhaust flange (with gasket) that could be a proper fit to the gc160 and a starting point to another fabrication?