If the school would not fund it through the governing body, then maybe approach local manufacturing businesses that want to make links with schools. If the business was to donate the funds to a school I am sure they would find themselves in the local media that would then help their own company with exposure. There are certain smaller printer companies that are selling them relatively cheaply. Maybe a fundraiser at the school fair??? Schools should see it the the future and put their hand on their pocket and fund them.