I just saw one in one of my library books....hang on...
There's one in the book "Quilt Revival: Updated Patterns from the 30's", last one in the book, page 76. The finished quilt is apprx 45x45 but could be sized bigger real easy. Shows complete construction of blocks. I *think* the blocks are approx 12".
Here's a pic of the quilt. Let me know if there's something in particular you need from the pattern. Try your library if you don't want to buy. I find books are a pretty good deal at Amazon.com and Borders with 33% off coupons if you join their email list. Hope that helps!
But after reading the other's posts, maybe I'm not understanding what magnolia pattern you want. New quilter, so this was the only Magnolia I knew about :)