Most carseat lists include seats available in the US only, and are not so helpful for visotors from abroad. An FAA-approved option (for those who are willing to spend the money) is the the CARES harness:
CARES | Kids Fly Safe
It is MUCH less bulky than a carseat, and works well if you can arrange for carseats on both departure and arrival sides. You might want to add a section about flying with kids to the redesigned site.
Thanks for the feedback.