upcoming Stacking title have been made real and were -- at least for a short time -- available for sale on the developer's site. Made in Russia, the real-life Matryoshka dolls were produced only in limited quantities and, as of this writing, are sold out.
So, if you really wanted these, you'll likely have to start monitoring eBay. A least your predicament means that Double Fine picked up some extra cash. Tim Schafer himself says he hopes Costume Quest vinyls may appear sooner or later, to compliment the Eddie Riggs figure already available.