I purchased a Blaupunkt Philadelphia 845 Car Audio navigation unit. It is new but does not have a map SD card. I am not an idiot but I'm not a techie person or a GPS person. How can I obtain negation software for the unit? Blaupunkt seems to be defunct, from what I can tell. There is ONE person on ebay selling cards but he says they are not upgradeable, nor are they compatible with the map downloads available on the Naviextras website that the Owners Manual referred me to.

The unit is supposed to run iGo software, but how do I get the card. If I go buy an SD card where do I download the actual software from?

Please help, as you can see I know nothing about this stuff. I didn't know not having a card was going to be such a big obstacle when I bought the unit.