SNES BOX theme

[Spider]

I've always been fascinated by themes for Emulationstation. A few weeks ago I decided to make my own theme for a personal project.
I wanted something that reminded me of the SNES Mini and that was different from the Ruckage project (a theme that I use and think is very beautiful), so I started making this theme, which is still in development.
Excuse my English, as it is not my native language.

I'm having trouble finding a pack of images with a transparent background and I'm not very good at Photoshop. I would be grateful if anyone could recommend a downloadable pack of images.