Thank you all for the tips and recommendations. Even though I very rarely use this system, I'm having hell of a time to let go of it. These gears have been with me most of my adult life; the L40s since 1978.
As a start, I'll follow dekay's great tips and look into a suitable replacement cartridge. If I find myself listening to LPs more and more, I'll consider an upgrade path for the rest of the gear.
Thanks again.