I bought a pair of JBL 4311B's back in 1980. I used them with a Dynaco St-120 and Pat-4 for years, but as the family grew and other things came up, they got neglected. I have decided to resurrect the old audio setup and will start with the speakers. The cabinets are in great shape and the speakers look okay. I am a bit worried about the condition of the crossover due to age. Are there any recommendations for replacement parts fro the crossovers? Thanks