Try this:
optech 4901002 Accessory Pack
It's $16, and I think it fits perfect... I have the Q w/ handstrap (also an optech), optical viewfinder, the standard zoom, 05 toy lens, fisheye lens, and the standard prime. There's a couple more pockets for sd cards, extra batteries, filters, and a remote.
I was going to use it for my small prime case (someone either here or on dpr suggested it was a great case for their limiteds) but thought this may work as a great Q case....
It has provisions for a shoulder strap and it comes with a handle.