Help locating a cleaning aid

Years ago(25) I had what was referred to as a deleader. I'll try and explain this as best as I can. I think it was made by Lee. It had a screen as a cleaning patch, and you pulled it through the barrel, and it helped to remove any lead deposits. Anyone know if they make them anymore and where I can get one? I looked all over Midway and a few other sites but could not come up with anything. I may be calling it the wrong name.