Here's another that was posted on this board: scroll down a bit. Of course, it's huge, and can be sized accordingly, but it looks simle enough. It wouldn't do anything with the panels, but they could be put in with these squares surrounding it. I know you have another pattern you found, and I'll look that up. Just keeping an eye out for something easy and quick. BTW, I didn't get them out yesterday but PROMISE I will today!!
http://www.quiltingboard.com/posts/list/23700.page