Because I have all the artistic ability of a lump of coal, I tend to do a
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to find something I like the look of.
Invariably, that ends up at a paid image site like shutterstock or similar.
Alternatively, I'll look at existing games that I liked the UI of in the past.
Then, because I'm a cheapskate, I will do my best to recreate sometime similar with Photoshop (or
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).
I might download the preview image and use it as a template.
To avoid potential copyright issues, I will always try to personalize the "my" version. Color, flourishes, something. Though most images I grab like this are so simple that it's difficult to tell similar images apart from different authors.
My expectation for a laptop or tablet screen depends on context.
If you're talking about a UI screen, then I'm back to google search or a another game.
If you're talking about a character within your game using a device, then I'd probably
try to find a laptop asset here on F95 (assuming you're using Daz3D). Some assets allow for another image to be embedded within itself as it's "screen" - though failing that, there's always Photoshop again.