fabricating them awhile back. He might still have an extra set of inner pipes or he might even be able to fabricate them for you. They look great! You can e-mail him at zustenon@hotmail.com or you can try contacting that guy in San Jose, who does the Mistu 12.5" brake kit and have him fabricate you a set of inner pipes. Forgot his e-mail, so do a search. Carl, should know his e-mail addy. Regards, Jeff