What about swap it for the bolt or the new volt 2019 7.2kW onboard charger?
Adding the DCC fast charger option have been done successfully in Quebec. It costs CAN$2200.
I think that this is a newer version of the 2014 batteries
20Ah now are 60Ah?
https://m.alibaba.com/product/1995384648/A123-60Ah-lifepo4-Hybrid-car-battery.html?subject=A123--60Ah--lifepo4--Hybrid--car--battery&detailId=1995384648&redirect=1