Here is a printing company that reports to all three bureaus. If you are a new company with minimum history they will still extend you net terms. For new corps when asked "Amount Requested" put other and put in the description sample pack. You will get an email back in regards to the samples which will set up a net account for you. You can also goto the main site by clicking the PRINTING box goto the resource tab and request samples and they will email you that way also.
main: The Design Squad
Business App: Credit Application
sample request page: http://store.thedsquad.net/store/request-sample.html