I only use the grosgrain from Joann's or other shops locally. you will find they are hardly ever labeled grosgrain. If it looks like a duck and the duck is 100% polyester then its grosgrain.
Yosemite Sam: Are you trying to make me look a fool?
Bugs: You don't need me to make you look like a fool.
Yosemite Sam: Yer deerrrnnn right I don't!