That model has been out of production for almost 3 years now. After that it became a 2-piece design with no resonator and it is made from aluminized steel
If you want a new one, the only way seems to be to contact BMP & get put on a waiting list. Once ~15 people commit they will have SS make a batch. BMP USUALLY buys extras, so you could try seeing if they still stock some from the last run.
Otherwise, start asking around on different forums because you can only get the odiginal model used. I am fine with the new 2-piece model, but you really need to weld the sleeve connection because it leaks like a bitch.
