Actually you can find more models in the same place at CP. Otherwise there more shops at Funan.
Most are lowepro. I personally have an original Pentax bag (it tells what is inside the bag!

) but its not so well padded and only 1 side pocket. But its small and compact.
When I went for the previous gathering, everyone else were using backpacks (the types where the top compartment is for personal stuff and the lower compartment for camera and lenses. Its easier to move around but I prefer to side sling bag because that allows me to access my camera and change lenses while walking.