Where can I find parts for this headphone? ex: folding mechanism.

The corner of the plastic piece that holds the hasp (don´t know the correct term for the central piece of the folding mechanism) in has broken therefore the hasp has fallen out and need a new one. I would like to know if I can replace the plastic piece and if so where can I get it. And as for the “hasp” if someone could let me know the measurements and or if I can get a replacement.