Yes they are available at Home Depot, Kohler has numerous round bowl configurations
Contact Kohler Customer Care. They were very helpful to me and they will probably send you a new lid and hardware.
Hi, this is Laura with Kohler Co. I am happy to assist you with your question. Please contact The Home Depot for information regarding their installation services. Thank you for choosing Kohler.
No, it is not a quiet close toilet seat.
A standard plunger will work.
16 1/2 inches
Comfortable height. Easy on and off. Perfect for my back surgery.
Simple response first = it doesn't matter. Essentially they are the same and accomplish the same task. Minor differences: Model #K-21285-0 has a slightly smaller flush valve size (3.0 inches vs 3.25 inches). It is a bit heavier in weight (109 lbs. vs 96.5 lbs). It costs $30 less than the other one. Other than that, I find no differences in the specifications. My guess is Model #K-21285-0 is the older model and the other one is "new and improved" by somehow reducing the weight and raising the price. Go with the cheaper model. It works.
no it should not wobble. Make sure it is seated correctly
Sly, my name is Jessica with Kohler Customer Service. I am happy to assist with your inquiry. The height of K-21285-0 is 16-1/2" from the floor to the top of the bowl, without the seat installed. The seat packaged with the toilet adds an additional 3/4" of height. Thank you for choosing Kohler.