Let me share how we solved it.
At the office we had plenty of video recording things with so-so audio. Rather than get another camcorder, mics and all that we opted for an audo recorder. The one that gets the most use is a Sanyo ICR-XPS01M. We have a Tascam DR-07 MKII as backup.
Then in post production we clip and align the great audio along with the other usual work.