Try to get some 3 mm isolated wire, then just fold a standard. After using it roll it back and next time make a new one, just to fit the next model.
Here a pic of my first model standard (didn't get the chacne to do anothger model, but very soon...) here i place the standard just inside between the front and rear and sits very thight, if I push the sidethings it will sit even tighter if possible :
