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Walmart carries some of these installation kits, there may be something in one of them you can use. A lot of them have bezels in the kits as you can see in the above link.
It looks like your head unit is missing the trim that snaps directly around the faceplate but one of those (see link) may work.
Or get fancy and go with a double din install kit for a single din unit. Just cut your hole to fit and then you gain a little space to throw random things. I've seen some double dins that have slide out cup holders too.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.