Oh, I’m already using those wallpapers on my desktop right now! In fact, as you posted that, I was just editing my post a moment ago to clarify that I could customize Aurora to look like Bluefin.
And by the way, while I’m here, I should mention that all of the wallpapers in this post besides the first appear to have been downscaled to 1920×823 by Discourse. I grabbed the full resolution versions directly from the Github.
Here’s a zip file of 'em all if anyone is interested, converted to .png for universal support: https://mega.nz/file/JcxRBaxa#5k6Yt1XHhc1o2vEvVIwQrqXV4TViCl1LCDKvfQ2Rh30