Hi jim, I bought 3 pounds recently from a chemical supply store. You can find it from flower drying supply stores as well. Here is an example: http://http://www.save-on-crafts.com/driedflowpre.html.
You should notice if you dry it from green it may crack. Maybe it is possible, I'll test it ....
Emre, I'm looking forward to the results of your experiments. I couldn't get the provided link to operate. Oh, well. I'm going to try "Michaels here in Brunswick.
Thanks,
Jim L