The Special Collections Library at University of Michigan has been digitizing pamphlets from the Labadie Collection for a web archive. There are currently 226 pamphlets online, and it's a very nice selection of things, including some individualist classics like Stephen Pearl Andrews' The Labor Dollar, Henry Bool's Apology for his Jeffersonian Anarchism and his Liberty Luminants, and John Badcock's When Love Is Liberty and Nature Law. There are multiple editions of some texts, such as Badcock's Slaves to Duty.
The archive is in the familiar Making of America format, so you'll have to page through things. Plain text is available, and relatively well edited, so the archive ought to be usefully searchable.