Megadodo Publications, of Ursa Minor Beta, publishers of that wholly remarkable book The Hitch-Hikers Guide To The Galaxy. Don’t Panic!
Where to buy online
Cloud City 7 (UK)
TeePublic (US & UK)
RedBubble (US)
Society6 (US)
Neatoshop (US)
You can find the design on t-shirts in most stores, but also on other products depending on the store (e.g. hoodies, mugs, stickers, notebooks, phone cases, greeting cards, cushions, socks etc).
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