ready4fun2day

Many years ago I purchased a pair of KG 4.5's for incorporation into my home theater system. They have served me well and I'm just not ready to put out the bucks to replace them. Unfortunately one of the bass drivers developed an annoying rattle that can be heard at low volumes. I'm not very technical in this area but suspect that something has broken loose in the coil. Does anyone know where I might be able to find a replacement base driver. They are 10" carbon graphite speakers. Thanks.