plastic discs Z3

[Marcel2]

where for the plastic discs with extinguisher for Kamara and small overlap

[Samuel1]

Not really sure what you mean, could you please elaborate?

[Marcel2]

Case This plastic discs in plastic so

[Marcel2]

these plastic discs in plastic cases

[Samuel1]

I would recommend that you contact your local Xperia Support as you can get support in your own language. They hopefully can help you find what you're looking for. 

[Qatrium]

If you mean the plastic corners of your headset, you should go to your nearest Sony support Center to have them replaced if they were lost/damaged. You can also order them from eBay but you may risk voiding your warranty as well as loosing water resistance.

[Uliwooly]

@Marcel2 @Quester

I think he meant the metal circles that are around the rear camera and maybe the power key.