For some reason there were several Amazon links for the same product (pillow) by the same company. They have used many stolen fanarts from many artists for countless products. After creating this post, I also found other products with the same artwork. This is every link I could find.

Pillow 1, Pillow 2, Pillow 3, Pillow 4

Mousepad, Painting 1, Laptop Shell, Laptop Shell 2, Laptop Shell 3, Blanket 1, Blanket 2, Bathroom Mats?, Painting 2, Lunch Bag, Messenger Bag 1, Messenger Bag 2, Messenger Bag 3

When a reverse image search is attempted, the best it has come up with is the profile picture of a certain individual on a Chinese social media site.

Chinese social media. Enter at your own risk.

Otherwise I have no more leads. Hopefully one of you have the original artwork or know another way to find it.

To be quite clear, I am not posting this to sell anything. In fact, I am quite opposed to this company steal artwork from the artists to make profit off of with cheap products like this. Please do not purchase from this unethical company.

Edits: more links and more info