I'm shocked you haven't rec'd any replies on this.
We're miles and miles from each other (I'm in Stouffville), but I always have lots of hornwort (with or without duckweed - although the without option is not guaranteed LOL).
I work in NY not far from Yonge & 401 a couple days per week, and if you ever know you'll be by that area, and you can let me know ahead of time, I'll be happy to share some with you.