Where to find ROM for GS4 Active

[pvthomas]

Hi,

I recently purchased a Galaxy S4 active on eBay that was running 4.3. When I went to update the phone, it says update interrupted, and when I try to update via Kies, the computer says that the phone is up-to-date. I tried to find a ROM to flash but all I could find was a pre-release of 4.3(which disables updates). Does anyone know where to get a stock ROM or how else I could update the phone? (I have the ATT version(i537))

Thanks in advance!