The plastic drain in a utility/laundry sink did not survive the attempt to remove or repair it. The hole in the sink bottom is 2" in diameter. There is a 3" diameter inset at the hole that limits the size of the drain's top flange. I have searched the web extensively and not found anything of appropriate size. The closest I can get in appearance is an Oatey 42099; it unfortunately has a strainer that's over 3".
I hope I don't have to replace the sink!