Create a video presentation from provided PowerPoint, video of demonstration of web application and script

We need to convert a PowerPoint, a web application demonstration (recorded without audio track) and a script. We will need someone who can convert this combination of content into a professional business-to-business video that we will use on campaign-specific landing page targeted at our key prospects. We seek a firm who has skilled video production and voiceover capability, as well as the ability to integrate some animation or other elements to improve the flow of the finished presentation. We would like to get the work done quickly.