Sadly, this pen seems to have reached EOL.
@atomicbird You know you can just buy a new ballpoint pen refill and screw this one open and replace it, right? The actual ballpoint pen is just a little metal stick on the inside. The plastic is just for your fingers to feel better and the extend/retract mechanism.
So unless the actual mechanism is broken (and even then you can offen just salvage a spring from another ballpoint pen), this pen should have another decade in it.
BeIDE on BeOS was really quite good for its time.