The electric blanket throw I have from Amazon is:

Tefici Electric Heated Blanket Throw,Super Cozy Soft Flannel 50" x 60" Heated Throw with 3 Fast Heating Levels & 4 Hours Auto Off,Machine Washable,ETL&FCC Certification,Home Office Use,Moose

I have several actually. They last a long time and are nice and warm. Sometimes I have to turn it down. It's currently $31.

Certainly not BIFL but I don't know of any BIFL electric blankets.