What is the best way to buy the extra WaW zombie maps for black ops?

What is the best way I could buy the zombie maps from World at War for Black Ops? Could I buy it at a store or would I have to buy them online?What is the best way to buy the extra WaW zombie maps for black ops?
You get it through the live store, or playstation network storeWhat is the best way to buy the extra WaW zombie maps for black ops?
Have a look for a code on Ebay, or just wait for them to be released on the PSN/XBL marketplace.What is the best way to buy the extra WaW zombie maps for black ops?
um currently the only way to get them is have hardened/prestige edition of the game or find a code on ebay or something other than that you wont be able to get it until they release them on the psn store may happen soon after ps3 map pack first strike comes out or could be never

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