You could easily do this using a simple mIRC script.
Please define the outline of this "simple" mirc script, as i doubt simple it would be, since you cant have the log already, you going to have to make a request for it, which means its a p2p responce system dependent on either a sleeper bot in the channel replying or other chatters also having the script and the server section running also to hand channel back chat to you.
