was just at my local woolies (Mudgeeraba QLD) and saw clear book cover on the shelf for 25c and 50c a roll. I picked up 2 rolls of each, (not sure that i necessarily needed any, but the ozbargain hoarder in me needed it). Came home to find it listed for the same price online, so I assume it is not necessarily store specific. Search for "book cover"
Thanks OP. Got some from woolies in QV Melbourne CBD