standard FM to read data from DFKKZP & display at portal level ?

Hi,

I am trying to find out the Standard Functional module to read data from DFKKZP & display at portal level, could not able to find any for my self.

we are developing a report to display the customer payments as on current date  as a portal page from FI_CA contract account.

Thought of checking before going for Z.

Thanks in Advance.

anilaa