how to obtain unobtainable outfit in AC Syndicate?

[redcomet]

Since editing game file isn't possible yet,i just try it with ce
But i encountered some problems while doing so.

let say i want to change Elise outfit for evie to her fight club outfit.

first i search 'Elise'(the name of the outfit in inventarory) as string.

and then i freeze the values of all the addresses(total 12 addresses,strange.) as the character changed to her fight club outfit.

But at the end when the fight is over,the character changed back to elise outfit as normal.Nothing has changed.

so i wonder how to obtain the outfit that can only be wore in specific mission or event using ce.