Here are some sites that may help:
1) You can ask questions on this site.
www.flowersforums.com/seed-999.
2) *This site has a variety of photos. Some show seed pods in various stages of development. Click on the link to the main page (and on the photos to enlarge them).
www.wildcrafting.net/forage/picture/151/481.htm.
3) This site doesn't answer emails, but it has a page of FAQ questions concerning magnolias, and I believe it may have links to other sites, as well.
home.att.net/~velvet-hammer/questions.html.
* The link to this second site is not working properly. If you open the main site, just type 'magnolia' in the search line, then click on the link that appears (magnolia grandiflra). That should get you to the magnolia home page. Sorry about the glitch.