That's happened me to. The pen from the safety lever is made of hardened stell and suitable for this application because it is very brittle and breaks easily. I have it replaced by an M3 screw without thread to the lower end. Is not much work.
So why buy these if they have no parts available? That is the reason I have not bought one of these and went for a Wildcat instead, and very happy that I did stick with FX products.