I make my own pipes I don't think they are what you would call true tuned pipe but I've made 4. Two for my bikes and one for Cruiser and one for Ilikeabikea and they didn't complain. I still have the rough patterns if you boys and girls are interested. The metal to use to make these is go to the body shops and ask for the wreaked body panels the shops will give them to you. I made all the pipes out of a dodge hood skin and a oxy/ acet. torch. I have pictures on this forum of my bikes with their pipes.
One week end me and ilikeabikea put on a live video how to on making a pipe on this forum so we showed that the average guy could do it, some of you people saw it quite boring.