What about this company? Is it still in business? It lists metric graph
paper for sale as well as many other sorts of things that ArchMat used to
provide:
Stoney Knoll Archaeological Supplies Inc.
P.O. Box 51636
Durham, NC 27717
Telephone/Fax: (919) 572 9262
Email: [log in to unmask]https://secure.northcottweb.com/stoneyknoll/index.php