iPad Pro 2017 Default Wallpaper

In a moment of madness, I tried a different wallpaper. I have been using the default wallpaper for a few years now so I believe it was from the iPad Pro 2nd Gen 12.9 (currently on iPad Pro 3rd Gen 12.9).

I was disappointed to find that the old default wallpaper is not available on my current iPad. All I have is an old screen print. Any ideas on how to get my old wallpaper back? Thanks.