Replacing entire drain plug housing question

[ivanputski]

Last fall I had to remove the entire drain plug housing... (3 screws)
The brass drain plug was seized and bending too much and I couldnt loosen it.

Now Its time to replace it.. are there all different sizes, or are they pretty standard? i Own a fiberglass 19' center console.

any additional suggestions so my boat doesnt sink?

(im a surfcaster who happens to own a boat for family fun,
so dont laugh at my lack of boat knowledge and stupid question ahaha)