More LOST Blogging

Regarding last night's episode of LOST, can someone please explain to me how workman Ben Linus got his hands on a pop-top can of super-fast acting, ultra-lethal, Dharma Initiative brand nerve gas?

Bonus LOST theory: Locke, despite being shot by Benjamin Linus in the gut in last night's episode, is not going to die because he is Benjamin Linus.