Hello, I am a newbie. I just found this website while searching for JBL parts. My fater is restoring his OLIMPUS and some how, the crossovers strted to fail. (LX5). Are there any replacement internal parts for this crossovers? He bought the speakers brand new many years ago (1971?) and has managed to keep it over the years. The old JBL gears are all useless now as they do not have parts fror the energizer and the preamp. The existing setup is an old Conrad J CJ7, a CROWN 300? amp and his old reliable EMPIRE 598 II. Can anyone help...please?