Thanks for the responses. After searching Home Depot and Lowes to no avail and after being convinced by my DW that neither a patch job nor a used sink would do, I called Coachlight RV, where I buy all my parts, and got one on order. It's setting me back $122 plus shipping, not as bad as I feared. After ordering, I found the sink at Lyon's Web site
. I might have saved a few bucks by ordering it directly from them but Coachlight has been good to me several times in the past so I'm happpy.