I just got one from the dealer. P/n 52019170-AB. Cost $38+change on shop account. List is $53-something. Took a couple of days to get in. I also got a Walker #21471 Muffler to go with it. The above in combo is exact length of original equipment but muffler outlet is 4" versus 3. 5" stock outlet. Also had to remove old hanger from original muffler and MIG it to new muffler to be able to use the original rubber hanger parts.
If I could do it over I would get a 4" system from turbo to tailpipe instead of piecing it together. However, at least in my world, cost is ALWAYS a consideration so that alternative will have to wait.
Good luck.....