Scleranthus annuus article in AIS Bulletin

This article is of major interest to me because I spend not countless hours but days in weeding my iris beds and would certainly like to look into a trial of this plant for mulching. Unfortunately they don't list any places to purchase the seeds and I have searched everyway I know how to find a place to buy seeds. Can anyone out there help???
Thanks
Marian

I went and looked and couldn't find a place. This is commonly referred to as a weed and I found several sources that say that it's invasive and or ugly. That may be why it solves the weeding problem though.