Creative Market offers simply striking mock-ups that are perfect for creatives!
They have so many beautiful options that you should be able to find something perfect for your theme.
Always remember to make sure that offered Licenses are right for your needs. Also, you have to be able to edit a mock-up, so make sure that the file types work for your image editing programs!
When you’re looking at a graphic package from Creative Market, the file types are indicated just over half way down, on the right. Better yet, you can fine tune your search by file type! Once you’ve chosen the perfect images, license, and file types; the only thing left to do is have fun creating!