I have created different decals for Rocket League, and these are available for download on this very page.

Install Instructions (thanks to @Hurricane_RL)

DISCLAIMER: You can only use the Steam or Epic Games Store editions of Rocket League to be able to use these decals.

All content shall not be reuploaded without prior permission from me in any circumstance

Click on the images for the download links.

F1 x Rocket League