I sent Susan Terpin an email. Here is her response:
"Hi Peggi,
Yes I designed the Zip Zip Bag for Connecting Threads. The pattern actually belongs to Connecting Threads, so I cannot sell it to you. However if you want to apply some pressure, contact Teri Stillwell at Connecting Threads, maybe she will release the pattern as a download!
I'm sorry I'm not much help in this case. I do have plans to write a 7" tablet and an ipad bag design for Sewing Sue, but it is just in development now. If you have any suggestions or requests, maybe I can work them into a design.
Cheers Sewing Sue"