Here is a version of TWRP for 4.2.2 http://forum.xda-developers.com/show...2458449&page=7 link is in post #3. You can try flashing it in fastboot to see if it will overwrite the stock recovery. I don't believe there is any risk. If it's not compatible it will simply fail.
Method is to flash via fastboot, reboot bootloader, reboot to recovery then reboot system.
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