I have a 69z with chambered exhaust. The exhaust has been on the car for 15 years. It is the most correct looking repo exhaust I have ever seen , I compared it to my friends factory chambered exhaust. The problem is the back two muffler-glass packs that run tranverse are rusting out at the bottom and I can not find anybody that will sell just the mufflers . Plus the ones I found did not look correct. Does anybody know someone who sells factory looking mufflers? Thanks