Yes i did, and he is super nice.
When i originally bought this rear exhaust I assumed it was stainless because of the pic but it was aluminum when i received it. At first I was a little upset just because the picture was misleading but after speaking to Mark i was assured that aluminum was choice because the ss was 3x the weight. He was very nice and offered to exchange them for the stainless. I decided to keep the aluminum and the intent of this post is just so ya know. Good quality part and clean weld.
Thanks RadDudes!