Seperate Monitor location for a group of extensions

Our company records most of our phone conversations, the trouble is that we run out of inodes on the server after about 3000 calls so I rarely have more than 1-2 days worth of calls at a time.

We have 3 extensions that I need to save seperately for longer period of time. So I would like to change the MONITOR directory from /var/spool/asterisk/monitor to something else but ONLY for 3 specific extensions.

I was looking through the extensions_additional.conf file and it appears I might be able to modify that to do what I need - but am unsure.

Anyone have any ideas?