I am considering running a Hong-Kong based Shadowrun campaign in the future, and even though I have found plenty of material regarding locations and NPCs (mainly in Runner Havens), I have yet to find rules and "crunch" for that specific setting.
One example would be that guns are more difficult to find in Hong-Kong, so a change in Availability would seem appropriate. Some advantages/flaws might have a different cost, some magic or summoning might work differently, and so on. I am not looking for ways to handle these specific points, but sources that would cover this kind of topics.
Basically, I am interested in some "crunch" to complete the "fluff". Is there any source out there that would mention rules for running Shadowrun in Hong-Kong? (bonus points for additional cities)