Which bag did you get that fit with the dock? I've looked at the sizes and cases and its either too big or just a bit shy of being smaller.I got one from Waterfield designs (sfbags.com).
I have an Ultimate SleeveCase for my iPad and I love it. Gonna sell it with my iPad, and my gf ordered me one that'll fit the prime :-D
EDIT: I got one that will fit the prime WITH keyboard dock. Wanted to have a single case for both.
42-30 is not even listed in their sizing chart.
I was told 41-28 would be good just for tablet only.
How is the moko?
And can you post some pics of it with the Prime in and out of it?