Found this product from another company on Amazon that after it said it was "sent", ended up on backorder till January '17!  Went on Wayfair, was cheaper price than on Amazon, and was supposed to be 3-4 days shipping, but actually arrived NEXT DAY without paying for it :)
We just finished building a new home with the Kohler Whitehaven farm sink and were told to get this product to help prevent scratching on the bottom of the sink.  In the 2 weeks we've had it, it has worked great and highly recommend!