Can you buy a GPS for a Sony Ericsson?

I realize that applications are no longer for Sony Ericsson Satio are limited, but I was wondering if anyone knew a Sat Nav option for her? I am not afraid to spend money, so I'm not looking for a way Free.

Navmii seems fine, £ 30, but look here: http://forum.o2.co.uk/viewtopic.php?t=29188&sid=aea9486ad78a98995183298ddce2bf75