Hi, I am making cookbooks for my family for Christmas, and I need to purchase more of the clear plastic inserts. The ones that I have, measure 91/2 x 11 (top to bottom and side to side) When ordering more, do I order that size, or do I measure from the perforated line (past the metal rings? I cannot seem to find 91/2 x 11. The standard size seems to be 81/2 x 11. Also, any ideas where to purchase them online or elsewhere? Please Help!!!!!!!!!!