Direct Dial (Local Numbers) Feature for A2billing System

I need a very experienced professional on A2Billing & Asterisk that has proven work history on the above feature as implemented on [login to view URL], [login to view URL] et al,. The scenario: Customer goes into portal, saves an international contact (Name and phone number). The system in turn generates a local U.S number against that international number. The next time this customer calls his buddy overseas, he skips the usual calling card sequence of access number -->account balance-->enter destination number e.t.c. He just dials the U.S number directly. No PIN needed, NO access number needed & NOT even the IVR. Its as if hes calling a regular local number. They can even save this number in their phone's contacts. In other words, a set of DIDs(say 5 or 10 or 100) are configured in A2Billing to be shared by all customers for this purpose. Routing rules to be developed in this project. Developer to also create a way in a2billing's admin panel for admin to add these DIDs at any given time. The presentation of this feature in customer portal as well as customer interaction should mimic that of localphone.com. Further details will be discussed in PMB. Please BID with confidence.