Here is working TWRP recovery for Vivo 5R.
Use Sp flash tool or ADB fastboot.
I have a quick question. Because this recovery is able to be ran on the Vivo 5R can it be flashed on a BLU Vivo 8L? I was told if you can find a recovery that is able to be ran on the same chipset (in this case the MediaTek 6753 chipset) it is able to be ported to the Vivo 8L. Is this correct or whould it brick the system?