Please help to find bios .bin for Surface laptop 1st gen

My laptop is stock in a boot loop and won’t respond to keyboard, so I am trying to flash bios with CH341A and can’t find an original dump anywhere online. My configuration is Surface Laptop 1st gen. - i5 7th gen/4gb/128gb ssd, serial#007503671457.
I would greatly appreciate if someone could help me with this.