Ext GWT concept test

I want to do some concept tests with Ext GWT. We are developing an application with this library and I need an expert developer with good knowledge in Ext GWT for building some concept tests about business dashboard to integrate in our application. First step will be to deliver a demo page with idea prototype without real functionality. I want to create a page with some widgets: - Tables - Graphics - Lists - Alarms We must integrate this page in our application for demo and get final customer feedback previous to any serious development. If collaboration is ok, we have more tasks to do. I attach an image with the type of results we want. Obviously, we want it a little more complex with graphics, ...