Reflowable ePub from InDesign

I have a fully laid-out, 96-page paperback set up in Adobe InDesign and the print side is finished. What I now need is a clean, reflowable ePub version. Here is what I will supply the moment we start:... (Budget: $150 - $300 USD, Jobs: Adobe Creative Suite, Adobe InDesign, eBook Design, eBooks, ePub, Graphic Design, PDF, Technical Documentation, Typography)