Dual exhaust tips on an SLK 230K?

Anyone know of a good (and inexpensive) way to change the single exhaust tip to a dual? Can you swap out the tail section of the exhaust of the 230 with a 320 or is there another way?

I mainly want to do it for looks since I understand there is no major HP difference with changing exhausts and I already like the sound of the stock resonator.

Thanks.