I have a couple of articles that I've made copies of and would like to put in my scrapbook. I was thinking about putting them in an envelope and gluing the envelope in the back of the scrapbook. I hope this makes sense. I would love to buy an envelope for this size paper that is acid free for crafting? I found some online, but they were around $6 with $7 shipping costs. I would love to find them locally but have no idea where to look. Where would I find them?