That you can find at sammoble.com but it will take a long time to download, I would try a modified stock rom like Fenny's 4.4.2 stock Deodexed, it's very close to stock with just a few tweaks.
But you still need to stick the modem, your reference for the similar tread also relates to a combination of latest firmware and modem reflashing.
Check this out and follow the instructions. http://forum.xda-developers.com/show...php?p=51017878
Sent from my Touchwiz device that never forgets apps.
Sent from my SGH-M919 using Tapatalk 4