I have a Cortez Jazz bass made in the early to mid 70's. It's basically a Fender knock off and looks like the Geddy Lee Jazz. The bass has really grown on me and has that well worn yet comfortable feel. I love how it plays and sounds except that the pickups are noisy and don't have as much output as my other basses. I could live with the lower output but the hum is starting to bug me. Unfortunately I can't just swap out the pickups because they are not standard Fender shaped jazz pickups. The ends of the pickups are rounded instead of squared off. There is shielding in the cavities but it doesn't seem to be helping much. What are my options for having the pickups repaired? Can I have them rewound? Will that take care of the hum? Any recommendations for who to send them to?