You can get a replacement nipple for that.
they clog up but with 500 of them and an ultrasonic cleaner I bet they last a long time.
I imagine you after a plague, or zombies, or war, in an enclave, 5 years later, panicking with only 2 spares left.
That trackpoint + the good old thinkpad keyboard were, to me, the best experience ever. But thinkpad were always too hot, too big, and then they gave up on that amazing keyboard.
Perfect thinkpad: - 4:3 screen - arm-based - touchpad-less, grippy-trackpoint - old-keyboard