40 hours of audio to be transcribed in one week?

Wow, I have a potential client that needs 40 hours of audio transcribed in one week! And they are on micro cassette tapes! So I will need to convert the tapes to MP3 files and then have them transcribed. The only way that I know to convert to MP3 right now is to play them out of my micro cassette player and record onto my digital recorder. Is there a better, faster way? Sure hoping so. I think it's going to be an intense week! And I don't even know when I'll be receiving the tapes for sure. We should know today though. The cool thing is we found each other on Twitter. My first business contact I've made through Twitter. Cool!