Custom Blackberry Messager (BBM) on iphone

Hi There Friends I am looking for a developer to create me a Custom Build Iphone Messager that can chat to Blackberry Messager (BBM) in real time. This app must receive messages from a Blackberry Cellphone device to our iphone app and also send messages. It can be a simple app, Mockup screen will be provide, I have a Apple developer account , so you can use my sccount to pusblish this app live to app store.