Interview transcription

I need a transcription of a 52-minute 1:1 audio interview which is in mp3 format. Both speakers in the interview are native English speakers. I would like the transcription to be done in Word 2007 and to be completed within the next week. It is for my PhD studies so accuracy and confidentiality are essential.

This is the first of a series of interviews that I will need to have transcribed. The audio file is 47MB which is too big to email, so I would appreciate suggestions as to how I could get it to you.