One member here mentioned to buy a NOS cart, i'm sceptical of that due to the suspension systems degradation over time. NOS carts should be bought with the understanding they may need a rebuild. heck any used cart for that mater.
@glennewdick How many NOS cartridge with bad suspension do you have (MM or MC), would you like to recall the brands ?
I have ZERO vintage cartridges with this problem, each NOS cartridge package i have opened myself was superb. I tried many. This problem does not exist for me, except for one brand i would never buy again -Technics cartridges.
I would never rebuild any cartridge, this is a waste of money (imo), i tried and wasn't happy about result comparing them to the originals.
A good cartridge must be fully original and in perfect condition.