I hate to tell you this but it’s not legal to sell this item or this design. If 20th Century Studios has anyone scouring the internet for IP violations, you are at risk of getting into some legal trouble. Sorry, and please don’t shoot the messenger, just trying to share information.
(also at risk of having the etsy shop closed, and from what I have heard (i don’t know personally from experience), etsy doesn’t allow you to open a new one. Just making sure you’re aware… we all have to make our own decisions about what we are willing to risk for ourselves.)