I have a SWR Silverado (2x12's) that I bought used. One of the speakers has a slight buzzing, and a scratchy sound when I push the cone in and out. I suspect the voice coil is gone. Rather than go through the pain of trying to get SWR/Fender replacements, I'd rather just replace them myself. Does anyone know the OEM speakers or a suitable 3rd party replacement? Has anyone replaced their Silverado speakers with any luck?