Here are some places students in the past have used. Make sure you get in touch with them as soon as possible to make sure you allow them enough time, and that they have the right equipment to print what you want.
1. Brown Printing: http://www.brownprn.com/
2. Rhino Digital: http://www.rhinodigital.com/
3. Clean Copy: http://www.clean-copy.com/
4. Documart: http://or.documart.com/store/storePage.aspx?id=416
5. Copyman: http://copymanportland.com/