On a request for a sticker display, I decided to make a 3D printable one. This fits on the A1 Mini and fits 3" stickers (that's the size of the stickers in the photo). There's an image that shows the amount of filament and time this print took. Makes me want to make and sell stickers tbh. Hopefully it's helpful for others!
This file has a commercial license should you want to sell it. Please do not remix it and claim it as your own digital file. You're welcome to remix it for yourself though (say make it a higher rise by raising the height or adding logos to the side).