not a recommendation but how about this one?
http://www.ebay.com.au/itm/ACT10-Wat...item3f060c4904
I'd be interested to know what you settle on because I've wanted to do the same thing though mine would be to record how perilous a ride to work can be - seems I have many more near misses than you do.
Hope your friend recovers okay
cheers
niko