Craft Construct

 
Prerequisite(s): Craft Magic Arms and Armor, Craft Wonderous Item
 
Benefit: You can create any construct you meet the prequisites for. Enchanting a construct takes one day for each 1000gp market price. You can repair damage done to constructs, up to 20hps per day at a cost of 50gps per point.
 
Source: Monster Manual 3