I just received this case today for my Q9C (link below), although it is not made for the extended battery, i tried it anyways. so here is what i found:
1. It fits with the extended battery, but it does not fit perfectly. Maybe
for picky people it will not work, but a solution until one comes out.
2. By removing the battery cover, it fits much better. I will try this for a few
days and see how it acts. I figure the silicone may hold the battery in
place but i do not know about the heating issue, i will try this out today
see.
3. the last resort would be for me to cut around the extended battery,
which means i would have cut the actual case just enough to fit
perfectly.
http://cgi.ebay.com/For-Motorola-Q9-...QQcmdZViewItem
So i believe is a good solution for people that need one right away.