Can these be re-dyed? I have orange/ginger hair there isn't a natural ginger or even just a straight up orange to use. I was thinking of a light blonde and dying that to match my hair.

They can be stained, but not dyed necessarily. I use Liquitex inks thinned out with alcohol to change the color. It works very very well and holds a long time. I've had my blonde with dark roots in for about a month and the color is still going strong. :)