Holding these magnificent implements may inspire you to write the next great American novel—or a really good grocery list. (Courtesy of Caran D’Ache) If SpaceX Made Pens Caran d’Ache + MB&F Astrograph Limited Edition Rhodium-Plated Fountain Pen $26,095 In a joint venture with watchmaker MB&F—Maximilian Busser & Friends, known for incredibly intricate and complex timepieces—Caran…