C.F. Nielson of Belgium makes very impressive high end briquetting equipment. See their site here: http://www.cfnielsen.com/ They also have a quartering system that cuts a 2.5" diameter extruded plug into 4 pie shaped pieces. These look to be fabulous downdraft gasifier fuel.
C.F.Nielson machinery is sold in North America by Renew Energy Systems.
http://www.renewenergysystems.com/index.php?option=com_frontpage&Itemid=1