It looks like LCSC have discontinued the thermistor that I specified in the original BOM.
LCSC.Part #: C95969
Mfr.Part #: SDNT2012X473F4150FTF
Manufacturer: Sunlord
Package: 0805
Description: NTC Thermistors 1/5W 47KOhms ±1% 4150K 0805 RoHS
A similar replacement would be
However this is a 4050K instead of a 4150K part - this is a simple configuration change in the web interface to DIYBMSv4.