Reading cost center, profit center details using SAP PI

Hi,

I'm using BAPIs BAPI_COSTCENTER_GETLIST, BAPI_PROFITCENTER_GETLIST from an external connector and able to fetch cost center and profit center details respectively. And now I would like to do the same but using PI bus instead of BAPI(RFC) call.

Are there any readily exposed services to this PI bus that I can use directly? Or these services need to be built and deployed first?

Any design specs. or steps on how to go about achieving this is highly appreciated?

Thanks in anticipation!

Venkat Koppala