I had to order them directly from Disney Floral. I think Impressions does them too, but I didn't want to work with them. My floral manager took care of it for me. These were a last minute addition that were a little expensive, but I'm so glad we got them.
We paid $100 for 150 Figment napkins. In comparison, I paid $35 for 250 Mickey and Minnie napkins for my at-home reception that I ordered from Invitations by Dawn.