I've never seen any theme like this for pterodactyl, it's definitely unique and visually appealing. I really recommend Nebula for anyone that's looking for a good theme for pterodactyl. The amount of customization Nebula has is crazy, you can make it look even better than what it is by default if you customize it yourself. What makes it even better is that it's in active development and receives updates often.
Now talking about the price, the price of Nebula is reasonable in my opinion, you can't really get a better theme for the price of Nebula. It is definitely worth the price.
I highly recommend Nebula to anyone seeking a visually appealing and customizable theme for pterodactyl.