The one shown at funtronics will not work on yours, it is way too small. I have one in my tool box to prove it
. I was not able to find a direct replacement for the entire drain flange but did see some promising alternatives at my local pluming store. I found a brass one that had the correct outer diameter to slip into the hole and also had the correct pipe size / thread pitch on the inside. The only issue I would have is it was round on top not hex, so my plan was lay the old plug on top, trace around it and grind it down a bit to make it into the hex shape I needed. Fortunately I was able to salvage my old one just needed to replace the locking nut.
Glad I checked before ordering. But I think it's unlikely I will be able to salvage mine.
I have found a few hex bushings that are really close, except the hex part is usually about 1/4" thick. Might have to do some grinding myself.
Appreciate the info!