Gnome Looking Mushroom source file is able to grab in various web, follow the link down below :

Teepublic :

https://www.teepublic.com/t-shirt/50772192-gnome-looking-mushroom

Redbubble :

https://www.redbubble.com/i/sticker/Gnome-Looking-Mushroom-by-WOLForDEER/152446483.EJUG5

Creative Market :

https://creativemarket.com/Wolfordeer/42248088-Gnome-Looking-Mushroom?published

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best regards

Tony Midi