Where can you find a Genji Helm in Final Fantasy Tactics Advance?

When Facing Elmdor in limburry castle if you look at his status you can see that he is wearing genji armour. In order to get the one of a kind Helm you need to steal it. It is no easy task i must say... but its the only way you can get it is through him. Or, if you're using an emulated version of the game on your PC, you can download a program called FFTastic, which can then be used to edit your saved game, either adding the item to your inventory, or equipping it directly onto your character(s)