Temperature Sensor with Current Sensor
I cannot recommend that.

The battery temperature sensor is an absolutely necessary piece of safety. Substituting it for a dummy is not an option.

Substituting it for an equivalent sensor is an option, but not based on the amount of information you have.

So, lest you want your deadline to actually have something to do with the death of someone (or at least a battery pack and inverter), tell your boss or client that you'll need time for components to arrive. Engineering is about knowing where to put priorities.