hi,
i looked into several international plans which will provide some coverage for you. BUPA Intl and AXA Intl both provide 4000stg cover for you after you have been with them for 10 months before making a claim on maternity.
I went with AXA intl. I went with the Area 1 (worldwide plan) which excludes usa/canada but does have, 20,0000 stg cover for when I do travel home should I require medical attention. the Prestige plan (which is the one that has 4000 cover= around 59,000hkd) cost 1383.89 stg/year (which is just under 21,000hkd). this already includes 20% discount which the offered at the time. Along with maternity coverage, they also have benefits like an annual checkup, some dentist coverage.
you can get more info by emailing
pppint.sales@axa-ppp.co.uk
hope that helps. they do have several plans, we opted for the prestige one.