Call unmasking system - repost

We are looking for someone who can develop a system that can unmask caller id of blocked calls. For better understanding of what we want I will try to give you a pratical example. Our goal is to have a system that can do the following: A (cellphone or landline) calls B (another phone user) with blocked caller id, B rejects the call and it will be forwarded to an asterisk box (or something) that can be capable to show the hidden number of A. We have found this video where Kevin Mitnick explains is method. [login to view URL] Please bid only if you can complete this project.