TCP_APP and UDP_APP with IP Groups

I collect statistics from our dual MPLS routers here at our main site. I have set up an IP group for a particular remote site using just the WAN interfaces of the two routers. This works fine and I get the utilisation, conversations and traffic types. However I am seeing a significant amount of TCP_APP type data. I cannot seem to find the port number(s) for this traffic anywhere. How can I find these port numbers so that I can add new applications to represent them. I cannot use the router interfaces themselves where I can see port numbers as any individual site generates a very small amount of data compared to the total traffic on the ports.