As you want quality, of course, I would be glad to work with you on your presentation. I speak excellent native British English (I trained at the BBC) and I have a good quality voice studio and plenty of experience. I recently voiced for the TUV quality organisation, and I am the regular narrator for Britain on Film DVDs.
Not sure, though, about the format you request. I can output almost any audio format from wav to aiff to any speed of mp3. If you can please be more specific I will let you know if it is something I can do for you.
Regards, Hellison (UK)