I am looking to do the same thing.. I think that the fabric may be called Textilene mesh and I have found a website which sells it
http://www.profabrics.co.uk/snap_product_search.php?search=true&category=Fabrics%3E%3EMesh%20and%20Insect%20Nettings
it would perhaps be worth calling first to confirm that this is the correct sort of fabric.
Jooolz
May 2008