Good luck with that.
Those are PWi's most highly guarded secrets. No legit game publisher ever publishes rates such as this.
Why? Because they would be legally bound to live up to any rates they publish as being in force. That is something they can never do and never will do.
The other reason is, well, they simply have no idea what those rates are.
Also FYI: No ROHAN pserver developer that does publish rates have any way of proving that those rates really are in force.