I've designed this mock-up for anyone to use. It's free for personal and commercial use. No attribution required.

It uses smart objects so it's quick to modify.

Format: .ZIP / .PSD
Smart Objects: Yes
Dimensions: 4000 x 2667 px
File Size: 35.3 MB
Commercial Use: Yes
Attribution Required: None

Get it here: https://www.luceliafoote.co.uk/freebies.html