I just made my self a pull through from a piece of speaker wire and it works great. All you need is a length of speaker wire (thinner the better) and some super glue. Add a little glue to the wire and form a loop (get yer other half to do this bit as a blokes fingers arn't capable of glueing the wire without glueing the fingers as well as i found out), hold for 10 seconds and you've got a pull through barrel cleaner. I used to use fishing line but this one feeds through the barrel better.

Mark