AllPosters.com

AllPosters.com has a huge selection of posters.  I have linked to their Christianity section but you could also search for christian inspiration.  If you have a blog, Squidoo, Hubpages, etc. you can join their affiliates program and use their posters to decorate your pages with a link back.  It’s a safe way to find artwork for your creations and who knows, you might even sell something.