Need some help here guys. My drivers side window is not rolling up and down right, I found the problem but not sure what the parts are called or where to get them. The piece (channel w/ a roller) that runs up and down that connects the regulator to the bracket holding the glass has broken the roller off from that bracket does anyone know what these two pieces are called and where to get them? I haven't seen any pics of regulators with this channel and bracket sold with it so I need some help if there is any out there.