It's on the WayBack Machine... Look under "Life in Sunnydale"
http://web.archive.org/web/20070529225404/http://www.missivesfromthehellmouth.com/There's a Prolog and then the 1st chapter starts;
Do not eat the customers. Do not eat the customers. Do not eat...
Spike tried to convince himself again that if he repeated the mantra enough times, he might actually believe it. Might.
It was half past ten on a bright Saturday morning. Tara was supposed to manning the cash register at the Magic Box while Spike was busy in the basement storeroom with the mail and internet orders, but Tara had told him yesterday evening that she'd finally gotten desperately needed lab time for one of her classes and couldn't give up, even if it meant asking him to take the morning shift at the store and dealing with the amateurs magicians who made up most of Anya's weekend trade.