Furnace Common Wire

The old circuit board for my furnace had a relay that was sticking so I got a new board that doesn’t have a ‘C’ connector (my old board did have a common wire hookup right on the board). The new board works fine but I’d like a C line to wire to my thermostat (my thermostat is cycling my furnace fan off/on and causing the furnace to click and not turn on the heat). Where can I connect a common wire to this new board? The board model number is B1809913. Attachment 42870 (http://www.doityourself.com/forum/attachments/gas-oil-home-heating-furnaces/42870-furnace-common-wire-currentboard.jpg) Can I draw from the transformer? Attachment 42871 (http://www.doityourself.com/forum/attachments/gas-oil-home-heating-furnaces/42871-furnace-common-wire-img_0847.jpg) Or is there a spot on the board? Or does this board not support a common wire? According to this diagram for my board: