Default I messed up... Stock 4.3 MK2 ROM ATT?

I searched and searched and couldn't find anything to help me.

I followed one of the threads to root my S4 on 4.3 MK2. I was in such a rush and tried to install TWRP.... and then I saw the bottom of the post saying you can ONLY use Safestrap.

Long story short, I butchered my recovery and sent it into the ethos. Upon booting into recovery I see the Android robot with a red caution symbol and "no command," and it throws me into android system recovery.

I tried installing SafeStrap and it claims that it can install successfully, but when I reboot it's not there.

So apparently I need to reflash my phone with a clean install of 4.3.

I cannot find a 4.3 ROM for MK2 anywhere. SAMmobile, StockROMs.net, Google searches, I can find 4.2.2 roms, but apparently once you're on 4.3 you can't go back to 4.2.2.

How can I fix this? Or do I need to visit one of the guys at the Samsung Experience Shop in my local Best Buy...?