Here is a clinker hull based on a N12 but with a Yawl rig and Lugsail main
http://www.ebay.co.uk/itm/sailing-dinghy-/221038782709?pt=UK_Sporting_Goods_Sailing_Boats_ET&hash=item3376f028f5
http://www.ebay.co.uk/itm/sailing-dinghy-/221038782709?pt=UK_Sporting_Goods_Sailing_Boats_ET&hash=item3376f028f5