Replacing cats




I'm in the process of restoring the car back to showroom condition.
I would like to replace them with new ones. I have done some research and noticed factory cats are hard to come by so my question is:
Keeping in mind that I want my car catted, what options are available to me?
If I'm not mistaken, the W208 V8 has primary and secondary cats right? How do I go about replacing my cats because I know they are shot from the stench at WOT.
Thanks in advance guys


