

There’s a lot of EV kits and also people converting petrol cars for a living, f.e. this little beetle:
https://youtu.be/kYmMrMEwl94?t=282
Just search for <Car maker> <Car model> <Car model year> EV Conversion Kit and you’ll find a lot of hits such as the first hit on duckduckgo for VW Golf 2005 EV Conversion Kit that may be bought with or without installation:
https://ev-evolution.eu/solution/volkswagen-golf-ev-conversion-kit/
On the T14 (not T14s) it is easy. See https://support.lenovo.com/us/en/videos/nvid500443-replacing-your-keyboard-thinkpad-t14-and-p14s-gen-1-and-2-customer-self-service
Seems to be available from ~30USD https://www.amazon.com/Replacement-Keyboard-5N20V44072-5N20V43774-5N20X68864/dp/B0B3RV3LK5
ifixit has genuine parts for ~75USD https://www.ifixit.com/products/5n20v44072-lenovo-laptop-keyboard-genuine