ThinkGeek is famous for its awesome April Fool’s pranks, which typically feature awesome but non-existent products. (They’re a geek-oriented novelty product store, so it makes sense.) Often, if the fake product proves popular enough, they’ll actually produce it. The best known is probably the Tauntaun Sleeping Bag, but in April 2010 they had a product page for an “action figure” of the iconic black monolith from Stanley Kubrick’s 2001: A Space Odyssey. Given the incredible ease of producing a big block of black plastic, they went ahead and made it anyway.
You can order it off ThinkGeek’s website for $12.99, and it’s also been popping up at pop culture stores like Newbury Comics.