The latest Apogee newsletter shows that the Saturn V is back in stock.
To the best of my knowledge, this is NOT an April Fool's joke.
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(I'm not affiliated in any way, shape, or form with Apogee other than as a satisfied customer. I also waited until after I'd placed my order for this before I posted here to make sure they didn't go away before I got mine... ).
David Erbas-White