Hey guys, i purchased my Cadenza a while back. It never came with a SD card, but i didnt need navigation at the time. now im planning on doing a few road trips, I'm wondering where and how I can get a SD card installed? I called the dealership and they claim the card itself will cost me around $400, plus however much they will charge to install it... Please help! I see there are some verdors selling on google/ebay, will they work? is there anything special needs to be done to "install" it? thanks!