Look at the First Defence (Defence Technology) MK-6 .7% OC spray. Very small and light and is in a streamer configuration (rather than OC fogger). That minimises "secondary" exposure. You must factor in the very real possibility of traditional OC fogger effecting the user as much as the intended target.
I got hit in the eyes during my LE training with the MK-4 .7% OC (same content) and I was (reasonably) incapacitated. I then spent an hour in the shower crying
There are plenty of you tube videos on this stuff I think.
http://www.defense-technology.com/aerosol.aspx?sub=.7%