The foam mentioned by Suzanne Quiggly is Volara Polyethylene Foam. I know of two sources. 1. University Products - Archival catalog - small quantities rolls or sheets - 1-800628-1912. 2. Rielley Foam - large quantity rolls only - talk to Jeff at 610-834-1900. Catherine Sieracki The Newseum [log in to unmask]