Retro Sci Fi covers! This is not my aesthetic, personally, but I know it speaks to many of you, and it does make a very cute 8.5″ x 7″ bag. 
Retro SciFi fabric by leslielstevenson@gmail.com, link in comments.
Retro Sci Fi Bag
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Fabric: https://www.spoonflower.com/en/fabric/3534973-retro-sci-fi-by-leslielstevenson-gmail_com?fbclid=IwAR3DA8Yq2V9q8arUWqDQ7Z6C3ZuVWqVr5kiXu_DkPd082OmTr5RJhucvKTI