Perfect Nokia 8.1 screen film and skin or back cover.

Hey Everybody,
I have been searching for a good screen protector ( preferably film since temper glass looks bulgy) and a skin film or cover case which is perfectly fit. But I am not satisfied with the ones available on the web. I got a good one too but not deliverable in India. 

Can anyone share their experience on this (
Marshland 3D Carbon Fiber Flexible Back Screen Protector Anti Scratch Bubble Free Back Screen Guard Compatible for Nokia 8.1) and ( Olixar Nokia 8.1 Film Screen Protector 2-in-1 Pack)?