No need to recompress it… DV frames are the same, for QT and AVI. So you just need to re-pack them from an AVI container to a MOV container and adujst the audio format.
On Windows/Linux FFMPEG is a good choice. The command-line would look like
"C:Program FilesWinFFffmpeg.exe" -i "XXX.avi" -aspect 4:3 -vcodec copy -ar 48000 -ac 2 -acodec pcm_s16be "XXX.mov"
This conversion is lossless and leaves the video untouched.