I got a cargo barrier for our Pajero from the guy below:

DOG GUARD CARGO PET BARRIER SKODA SUPERB COMBI 2010-ON | eBay

At the time he had cargo barriers for the 2008 on Octavia's but I notice he doesn't have any listed at the moment. It's worth messaging him on eBay and asking if he has any.

Cost was around $350 delivered to AUS and it's very solid. Much cheaper than the full cargo barriers you can buy here in AUS. It also only covers the area from the top of the rear seat to the roof was is all you really want. Also really easy to install and take out.

Highly recommend the barrier.

Cheers