The larger islands have 2700 m. and longer runways so longer than even KJ-2000 needs. The other islands have helicopter pads that are too small for KJ-600.
There must be islands in between postage stamp and 10,000ft runway size.
Obviously the major application for KJ-600 is as a carrier-based AEW platform and that is an application with a very clear ceiling on total numbers: likely 15-30 airframes.
The point of my previous post was that these very modest production numbers could be supplemented both by export orders and by limited orders elsewhere, e.g. from China Coast Guard.