Lenovo w520 BIOS extraction

[Esfirius]

Hi!
In a recent BIOS update, my computer has crashed and won't boot. So, I want to get the BIOS.wph for Crisis Recover to restore my BIOS. The problem is, I am unable to get the W520 Bios file. Please correct me if I am doing anything wrong:
1) downloaded the latest BIOS update from the official website
2) extracted the .exe file
3) fould $01c9200.fl1 file
4) now when I try to extract it using e_bcpvpw, I get he "source file not acceptable - missing header" mistake

what should I do? Thanks!