Speak Text for Short Video

I created a short video (less than 5 min.) but my first language isn't English I think for the US market it'd be spoken in American English. For this reason I'd like someone with a good sounding voice to speak the text for this video. I'd be fine when you have He/ she also should look over the text if it's written in good English. I'd be fine when you would have something like Powerpoint (I use a free Opensource version) and CamStudio (it's free) to produce the video. When not it's not a problem. Than only provide an audio file. Juergen