Where Can I Get 535 Copies of the Constitution

Cheap? I want to mail a copy to each member of Congress with a note:

Dear Sir or Madam:

Please find attached a copy of the U.S. Constitution and its 27 Amendments.

READ IT.

MEMORIZE IT.

DISCUSS IT WITH CONSTITUTIONAL LAW PROFESSORS. (Obama doesn't count.)

THERE WILL BE A TEST COME NOVEMBER.

Thank you for your attention.

UPDATE: On second thought, perhaps I should send them each a roll of this.

They'd be more likely to actually open it.