These items are not craftable, at the moment. Instead you must gain a magical cloth deed and double click this item to produce a clothing item with a skill bonus on it. These bonuses range from +1 to +10 and can be granted to most of the clothing items found on the tailoring crafting kit. The magical clothing deeds are a reward found in treasure hunting chests and through other means found within the fabric of UOE.
They used to be able to be gotten from the EC slot machine. However, now the main sources are T-Maps like Sturger said, as well as Fel. Dungeon Chests and the Task Event System. Of course, Player vendors regularly stock them, but they tend to be pretty expensive these days.
