Voice over with US accent for approx 7 min video

We currently have a video on our home page www.steelbeamcalculator.co.uk which is aimed at the United Kingdom, the video is 7 minutes long, we are doing a video for our www.steelbeamcalculator.com which is aimed at the United States, we are looking for someone with a neutral US accent to do the voiceover, this will involve watching our previous video and then reading and voicing to a script that will be provided to you, the video will be approximately 7 minutes long.