hi, i own a pair of polk audio Monitor Series 2 speakers(M 5 jr+). After many years of faithfull service, the woofer in one of the speakers has given up. Question: can i replace the current part (MW6502) with a MW6503? if i can, i intend to replace the woofers in both speakers. Does anyone have any 6502's they want to get rid of? (i reside in Australia). I love the sound of these speakers, so i really weant to repair/reinstate them. thanks.