For Canadian photographers looking for v-flats:
there is an amazing art store in Vancouver/Surrey/ONLINE that sells foam boards:
Search for: black-on-black-foamboard
To search for black enter:
Black on black foamboard Black FBN4896-1
Free delivery on orders $59 or more. Outstanding customer service.
You’ll need two boards (I used 4 by 8 feet and cut 12 inch since ceiling is 8 feet).
About: I’m a beauty photographer based close to Vancouver, BC.