mono wav file -> stereo wav file

[blindmelon]

The other day I wanted to record my band live during practice and quickly setup a mic in the center of the room and did a quick and dirty mono track recording in PT. When I was done, I tried to drag that into I-tunes for CD burning, but I-tunes apparently doesn't like mono files (odd). So, the thought of bouncing this hour long file in real time is not pleasing, so is there some simple way to convert a mono wav file to a stereo wav file (both channels the same), either within PT or via an external (cheap or free) program?

Thanks in advance - blindmelon