NWR- where can I buy snowflakes for windows?

The clear kind that just go on the window and stay on, no adhesive or anything.

I want to decorate my classroom with them..
went to Michaels last night and they didn't have any..will be checking back there tomorrow they said they have a truck coming in..any other thoughts?
Just snowflakes or snowmen type things..somewhat plain..this is for a hs!

thanks!