VIC Need help with my VM Passat - map update

[Johne1]

I am having VM Passat 2013 model which I bought recently as second hand in Australia.

My firm and navigation details are below
Delivery part number : 1T0035680L
HW version H09
SW version 5238
Active map coverage Australia and New Zealand
Active map supplier : Sensis
Map version HDD 7920


I just wanted to if I have the option to upgrade my firmware and map version. If so where can I get the software for the same.

Thanks in advance