Replacement/spare parts?

hello! i have broken the small tab atop the "ZR4" plastic part [2] by dropping my controller, ZR no longer works in clic-mode because of this

the macro buttons 1 and 3's hinges also gave out, i probably pressed them too hard D: [1,3]

where could i get myself some spart parts?

KK3 Max NS39 it was bought from Sanzhuo-FR on amazon