Product review (2 stars): Buy this and you'll regret it like me
I didn't buy this on Amazon but I have owned this exact same model for 3 years.  I am here searching for knobs because I'm sick of the existing knobs that I have almost melted off.  Problem 1:  a medium sized pot makes the lower right and left burners too close to the knobs.  This is the worst design ever.  What's more dumb than this?  Problem 2: See the little burner in the upper right?  It doesn't put off enough heat to cook anything yet, there it is, wasting all that cook-top real estate.  Why couldn't the little burner be near the knobs????  Problem 3:  Long ago, the gas stopped igniting from the igniter.  You would think with all that clicking and sparking the gas would touch the flame but NO!  You can hear and see a spark but the gas stays away from it and it doesn't ignite.  As soon as you start smelling a lot of gas then you start thinking about the fireball you might be standing in the middle of.  Keep matches nearby.  Problem 4:  Stupidly, I though the most expensive one (this one) in the store was the best.  I'd recommend you spend less money and get something better.  About the only positive thing I have to say is this crappy cook-top prevented me from buying an expensive Electrolux refrigerator.  Who knows what kind of problems that might be engineered into their refrigerators.