Navsure 420i SD Card/Download/Help!

Hi,

So I just bought a Navsure head unit from someone on here to find out that the SatNav isn't working on it, googled for a few hours and found that it's a 'common' issue. I've looked up and down on the net for a download to an update so I can essentially reboot/refresh/update/fix the satnav program but they don't seem to exist anymore or links are dead. I've also tried the handful of manual fixes too but had no luck.

So by pot luck is there anyone out there that has one with a working SD card that can clone the contents onto their PC for me and send it to me! I don't want to have to send this back to the seller and equally he doesn't want it back but I don't have much choice if I can't get one of the main points of sale working!

Thank you in advance!