Oct 15, 2010 I ordered from Hollinger Metal Edge
100 sheet pack IP810 buffered interleaving paper 8x10 $6.60
100 sheet pack IP1418 buffered interleaving paper 14x18 $25.85
five 12x10.625 HG Print file boxes @ $10.55 each
I have used their larger boxes for 7x17 negatives for several years and when they changed shape to a flatter style, my friend John Bowen was kind enough to sell me some of his extras in the original shape which allowed upright edge storage of the negative rather than flat.