halloween costume crisis, need 3x or 4x, please read this every1!!

i dress up/or make my face up with my kids every year. well this year i want to look the part.. i am doing a goth like look this year... does any one have a long sleeve shirt, shiny or not, or a black dress that would work, or a long shiny skirt????? if any one could help me out.. borrow or give to me.. please let me know ty