There are actually quite a few ways to create a fake facebook page. One site is a subscription service called ClassTools.net. There is another site called TheWallMachine.com, but it requires you to login with a Facebook page. There is also a template in Google Docs. The template is of a Facebook profile page rather than a Facebook "wall." That one looks promising, but I wanted to try out MyFakeWall.com for this post.
To use MyFakeWall.com, you need to create a user name and password. It's a simple process. The site is very user friendly and easy to figure out. I created the start of a profile page for Mozart in just a matter of minutes. You can see it here. Unfortunately, there are ads on these pages. I didn't see any ads that were inappropriate for elementary aged students, but I didn't spend a very long time on the site either. I also wish there was a way to search for pages that were already created. It would be nice to know if someone had already created pages for composers.