Well there are only two or three cultivators growing their own seed in illinois right now. And as of yet they haven't been willing to let any seed go out for sale. I will talk with a guy I know that works for the industry to see if anything has changed recently. But at least check, that was the way things stood.
In the meantime though, I would recommend ordering from The Vault Seed Store. They have a great selection of high quality genetics and great customer service. It took around ten days for my Passion Fruit seeds to get here. They are always running great promotions too, like free seeds with your order and such.
You could also get lucky and find some bag seed in a can from the dispensary. I got some that way as well. good luck!
