lost protective bar that keeps powerbutton on hes place.

Hello there, repair technicians .

So i got an issue and i don't know how to solve this.

so i repaired my xperia z5 compact and i think i lost the Protective Bar, that keeps the power button on hes place.

so now when i use my xperia the power button goes into the mobile case.

tried thing like a little bit paper between it or something like that but that didn't work.

so now my question is how can i solve this or where can i buy the protective bar.

Many thanks for reading , hope someone can help me.

Greetz Brian