Here are some wallpapers that you can find in various resolutions, including those near your 1000x798 request, through sites like WallpaperSafari and Wallpapers.com :

[20+] Blaze And The Monster Machines Wallpapers | WallpaperSafari Wallpaper Safari

[20+] Blaze And The Monster Machines Wallpapers | WallpaperSafari Wallpaper Safari