Finding an ESC for a LiFePo4 Battery
It is generally a bad idea to let a motor/speed control decide when your batteries need protecting, even if you use a LiPo ESC on LiPo batteries, the monitoring should be separate and inside the battery pack.

For a couple of simple reasons: 


On a collision you want any shorts to be protected from the battery outward, even if LiFePO4 is much safer vis-a-vis explosions.
A "remote drain" deciding to throttle or shut off can cause oscillations through wire resistance and inductance that end up being more harmful.
A power drain deciding to shut off creates the invalid "feeling" everything is protected, when other devices can drain enough to finally kill the battery.
When a battery is replaced by another chemistry you don't have to change every other component (the only non-safety-related point).


No project, ever, anywhere using a rechargeable battery somewhat smartly or professionally should off-load the UVLO (under-voltage lock-out) detection to individual devices, but have it at the battery. The one exception is a single bespoke PCB in a fully qualified housing with a rechargeable battery, such as tiny Bluetooth headsets, where the constitution of the innards will not change outside of a complete design path with meetings and verifications.

So, do as aDub says: Get battery protection and turn off the UVLO in the controller.