I have looked for a pen repairer, and there are only a handful in the country! The age ranges from more than forty to more than eighty, and there are no descendants at present!
Unless everyone picks up their pens again, the profession of repairing pens will disappear.
I am worried that no one will repair my broken pen in the future, buy some cheap ones, or cherish my favorite pens more.
Regular pen manufacturers have after-sales service departments, which is to send them back and forth, which is more troublesome. DIY is a small problem.