Marketing promo video explainer

Hi, I am looking for a marketing promo video to be made for a new product that I am looking to launch. The product is an online control panel and while we are looking to create the script, we need to someone who can do the animation and the voice-over. The quality of the video needs to be high, so no chancers: Here is an example of a high quality video we have found, so we would be looking for something similar to this. [login to view URL] Remember we voice-over as well, which needs to be English American. I will also need to see a portfolio of services you have done already that will demonstrate that you ahve done this kind of work to a high standard previously.