Where can I buy sheets of plastic mirrors? The type used in schools for science/ maths activities.?

Here are a couple sites I found:


http://boreal.com/category.asp_Q_c_E_546鈥?/a>


http://www.learningthings.us/acatalog/pl鈥?/a>


http://www.teachersource.com/catalog/pag鈥?/a>


Let me know if these help.Where can I buy sheets of plastic mirrors? The type used in schools for science/ maths activities.?
On Ebay ? Don't they have anything on Ebay ?