John, I am not sure where to suggest you look. I would think the big dealers like Memphis will have it. Unfortunately, as you know, there are almost no A2 parts trucks from what I have been able to gather. The A2 specific exhaust and air intake parts are almost non-existent in the surplus market. I had to find these parts when I was putting my M925A2 back together. A friend had this stuff fortunately, but he has sold out all of this M939 series parts to one of the big dealers...and they want an arm and a leg. For example, he had fenders that were NOS. He wanted $125 each. When I called the dealer about them, they wanted $425!