What are the rear-facing extended car seats available for my 13-month-old twins?

Read the blog article here: bit.ly/2VLyOsW
In this week’s Car Seat Chronicles, Elise advices Sue on her options for her pair of twins, who seem to be outgrowing their Doona infant car seat at thirteen months. If you find yourself in a similar situation, read further to find out Elise's recommendations. Alternatively, you may listen to the podcast below. xx
At thirteen months old, Sue thinks her pair of twins are about to outgrow their Doona car seats and wonders what her next seats are. Sue gets around in Singapore with her seven-seater VW Touran, and would like to keep her kids in rear-facing extended car seats. While it is not necessary, she feels like it’s an additional plus point if the new car seat is a travel-friendly, US approved one.