Special size card cello bags

Hi,
my apologies if I post in the wrong place, I thought the cardmaking forum would be ideal.
I need to buy clear cello bags for my cards, they need to be 26 x 17 cms or 10.5x7" (with an additional part to close them)so i can put my cards open inside them and people can see what is in the inside, if it makes sense to you.
If you know what I mean, any idea where I could buy them?
I need around 100 and I need them for yesterday.
Thanks in advance, :wub:

I normally get them from ebay - lots of various sizes and quite reasonable prices too.

Thanks for your answer. I already had a look but can't find that size. They seem to miss 3 cms !