Spekki-Os! The breakfast cereal that tastes like WAR! The Os themselves could be blood-flavored. There could also be little clusters of bitter ash, flakes of burnt metal, and it could be taken with wine instead of milk, to symbolize the drunkenness of power with which a few people send many others to war without cause.
On a more serious note, something I'd really like that could never be mass-producible would be a single-piece wood carving of all six main playable characters, in some of their best action poses, with a clock inlaid, with real clockwork inside and real chimes that would play the Westminster chimes on the :15, :30, and :45, and the first full segment of the Chrono Trigger main theme on the :00. At night, it would play the Radical Dreamers main theme on the :00 instead. Yeah. That'd be cool.
More realistically than Spekki-Os or an old-fashioned mantle clock: I'd like to see a really good artist paint pictures inspired from the games. Maybe I would commission a couple. There are some powerful images in the Chrono series.