Sink to fit 16 3/4 inch by 20 inch cutout

[elbarcolutra]

Hi--
We have a 16 3/4 by 20 inch cutout in our vanity. We are looking for a dropin oval sink that would fit this opening. Unfortunately, I don't have CAD software so cannot access any of the information provided in product descriptions.

It looks like the Kohler Maratea 2831-1-0, or American Standard Fire Clay (0293.008) or Piazza (0478001.020) might work, but I can't figure out how to get the cutout. I've spent about 4 hours calling the various technical service offices and not gotten this information (they can send me a paper copy within a few weeks...).

Can anyone provide any help--either about the above sinks or other alternatives???
Thanks!

 

[havasu]

It would be much easier just to replace the counter top and match it to the new sink.

 

[elbarcolutra]

It would, except this is a boat, and it would be VERY difficult to replace countertop.