The original version of Deadly Premonition has become harder to get now since the Xbox 360 is out of print, but if you don’t mind a digital release you can get the cult classic for $19.99 via Xbox Games on Demand. Killer is Dead will also be available for Games on Demand for $49.99.
What’s interesting is the rights, at least for the Xbox 360 version of Deadly Premonition, reverted back to Xseed. While Marvelous AQL is Xseed’s parent company, they didn’t publish Deadly Premonition here. Ignition did. Ignition also handled other Marvelous and AQ Interactive titles (when they were separate companies) like Muramasa: The Demon Blade, Blue Dragon Plus, and Arc Rise Fantasia. Perhaps, Xseed has the rights to some of those now too?