Here's the link for the CDC plan for the Zombie OutBreak.While I don't doubt the US (or any) government might have a contingency plan for an actual zombie apocalypse, I doubt very much that information about it, or any of their contingency plans are available for civilians to Google.
The CONPLAN 8888 was declassified and is publically available via FOIA.
It was also a training exercise in plan writing since nobody takes the "Zombie Apocalypse" as a realistic scenario.
It's just something for Plan Writters to work on as a Academic Exercise.