The updated cwm is on the cwm web site, but it is in img format, which means you have to use adb on the command line to overwite your current recovery with the new one.
I took a flashable zip from another phone and replaced the img file inside with the tmobile one and that is what I use. Here it is if you want to use it: https://drive.google.com/file/d/0Bx_...it?usp=sharing
Make sure you know and pay attention to what you are doing, screwing up the recovery will be a bad day.
Jellybean roms use TWRP recovery. http://teamw.in/project/twrp2/113
Some have had better luck with 126.96.36.199, but the latest version should work also.
You need to have a copy of twrp and a copy of cwm on your sdcard so that you can go back and forth between jellybean and kitkat, if that is what you want.
Do your system wipe/factory reset in the recovery that you will use to flash. So going to Kitkat, first reboot into recovery, do a full backup of everything, then flash the cwm zip, then reboot into cwm recovery, then do factory reset, then flash your rom zip, then flash THE CORRECT GAPPS
, then you can reboot.
Going back, same thing. Recovery, backup, flash twrp, reboot, recover your backup.
Gapps are important, there are 2 different jellybean gapps one for 4.3 and one for 4.4 Kitkat, be sure you flash the right ones or, you will just get an error, or you will get errors when starting up, either way it won't work. http://wiki.rootzwiki.com/Google_Apps
This thread is where you get the 4.4 Kitkat gapps, full package is fine, just be sure it is the 4.4 one. http://forum.xda-developers.com/show....php?t=2397942
Read the ATT forum also as the device is the same, but don't flash ATT roms unless you are using the patch. http://forum.xda-developers.com/show....php?t=2573315
Lot to read and understand and lots of files to get on your sdcard before you proceed. Good luck.