NEW YORk (REUTERS).- After 9/11, President George W. Bush famously urged Americans to shop to bolster a shocked U.S. economy. Now after Osama bin Laden’s killing, consumers are snapping up memorabilia of his dramatic killing. The website Zazzle, which lets customers submit designs for items such as t-shirts and buttons, said Wednesday it has handled thousands of orders this week for merchandise related to Osama bin Laden’s death. Marketing Director Mike Karns said Zazzle has fielded tens of thousands of submissions for designs, including one that was submitted Sunday almost an hour before U.S. President Barack Obama officially announced bin Laden’s death. “It’s been boiling up for 10 years and this is the moment where people can finally express this sentiment,” Karns said. Popular items include a keychain saying “Osama Bin Killed” with crosshairs over a caricature of bin Laden and t-shirts thanking the U.S. Navy Seals unit that killed him. Street vendors from New York to Chicago