Domke f-4af may be what you want? or try one of the satchels from Domke...f-802, f-803 or the f-804 super satchel?
What Joe said below.
The f-4 is bigger than the F-3x!
I had the f-6 and now have the f-3x, it really isn't that big and it "compacts" nicely, unlike the F-6 because of the fourway insert. I think you would like the f-3x, have you ever seen one? It really hugs your side very well making it seem smaller.
I have no doubts that I would like the F-3x, but I don't think my wife will, and she will also be using it. The point of the bag was to get smaller, much smaller. While the F-3x may not be as big as the F-2 it sure holds a lot. I haven't seen one in person though. And I would really like to try and keep the price down. The F-3x still runs about $100.
Man, why couldn't Domke make the F-8 just a little bigger? 









