Hi B.,
Unfortunately, you are going to have a difficult time getting the schools to help in the class with these sensory tools.
I am an OT and have some suggestions. If you give me more information, than I can give you other things you can do.
I like to use brushing along with vibration. I find that the two work better together. I usually tell my parents to brush first, then follow with vibration using a little hand held vibrator (you can get one from Walgreens). Then we do the joint compressions. We also use the vibration pads that you sit on. You can put one on a pilates ball, or if you can purchase a 40 inch ball you can lay the child on the vibration pad on the ball and rock them slowly. If you can really concentrate on that during the weekends, you may find that her touch sensitivities are not as bad and maybe the school won't have to brush her at all.
If you have any other areas of concern let me know and maybe I can give you some more suggestions.
p.s. has anyone mentioned or started her on Therapeutic Listening? It is a great tool for knocking out auditory sensitivities as well as calming in general.
L. Malagarie