Yeah, my dad carried a burning chip pan out of the kitchen and scarred his arm horribly.
I'm not sure there's much to choose between fire blankets, although you might want to check their size. A typical one is a little less than one square metre, which is enough to cover a 60 cm cooker top but not necessarily a 90 cm one. (They're slightly oblong, not square.) They might have incorporated asbestos in the distant past, but these days they're a dense airtight weave of glass fibre, I think.
When it comes to the emergency, you need three things. That you can find it quickly in a smoky room (and without opening cupboards). That it's securely fixed to the wall. And that when you pull the two red cords it all comes out with no arguments.
You'll have to take the third one on trust! Anyway, get one. I'm glad I did.
BJ