Thanks "insane"!!! Let me tell you, it's extremely frustrating to look at all sorts of bags/carriers/holders and discover that they're almost perfect EXCEPT for just 1 or 2 things!!!
I have been searching for the "perfect knitting bag" for awhile now and still haven't found it! What I have found is a lot of "almost perfect" ones that I will use instead!!
Same thing with supplies pouches! I found a zipper one @ Office Max for less than $2.00 and it's currently working out well enough. It's roughly 8 1/2" by 11" and is supposed to fit into a 3 ring binder. It's ok for right now, but I anticipate the zipper breaking in the not-to-distant future.
Good luck with your designing!!!