I mean the trademark phenolic resin not fiberglass resins. For bulk call Sheffield's Knife Supply @386 775 6453 and a link to a link to their catalog, still 2013 catalog. They have bulk phenolic sheet. Some is trademarked, but all is phenolic. Pages 30-31, also second to last page has pics of their stock from canvas, linen and paper. The linen has a nice grain to it and a personal favorite.
Some folks make homemade micarta, but they are not using phenolic, but typically fiberglass or some epoxy resins. Call me old fashioned, but I prefer the tint of real phenolic Micarta.
http://www.sheffieldsupply.com/