Reader Asks About Tree-Free Paper in Portland

One of our readers, Annie, wrote in asking this question, perhaps some of you can help her out:
I am looking for some lovely, heavy-weight paper to use in our wedding invitations. My ideal would be tree-free, but I'm open to 100% post-consumer stuff. The catch: I need to buy it fast so it needs to be available in a store in the Portland area. Any suggestions?