Using the Links and Video posted here, you can download, install and run the Nokia Care Suite software. This software allows you to download the Latest STOCK OEM ROMs directly from Nokia Servers. It also allows you to flash these ROMs to your Nokia Phones. Keep in mind, this WILL WIPE YOUR PHONE
CLEAN! So, be sure you have a backup of all your data, photos, videos, texts messages, etc... EVERYTHING
PS: Use these at Your Own Risk! I will not be held responsible if you destroy your new Lumia with these. With that said, I've flashed my own Lumia 900 8 times and my Lumia 920 3 times with no ill effects.