[Q] Where can I find stock rom for SGH-M919 4.4.4? topic

I need to send this back in exchange or update. Have had sim card issues with 4 S4's now this being the 5th. With changing the sim cards many times.
So i need to format back to stock and send in.

Can't seem to find the rom or process to get it done with odin or w/e is needed