I am picking up a couple of pairs of DCM TF-350's tomorrow. The owner said that one pair is in very good condition all the way around. For $25 more he is throwing in a pair that have the grill sock removed but the drivers work. Anyone here ever replaced the grill "sock" on a pair od Time Frames? I'd appreciate any help I can get, it would be nice to be able to use all 4 speakers.