Elusive Fabric Hunt


Has anyone seen this fabric by chance? I know, the photo is positively awful, but it's a snapshot of my TV playing an episode of Poirot on Masterpiece Mysteries (this one is The Third Girl: the dresses were so gorgeous they made my heart ache) that has the best 30's costuming EVER. I've fallen hard for this polka dot fabric, and have been searching, but to no avail. If it looks familiar to you, would you please send me a clue?
Many thanks,
Laurie