[Ron Ramirez]

No one ever made an accurate pattern of the cloth which your 44H had originally.

That said...Kenny Richmond's "Whiskey Rayon" or the GRC02 from Radio Daze would be good substitutes.

http://richmonddesignsinc.com/grille_cloth_product_page

http://www.radiodaze.com/grille-cloth-02-item-grc02/