Broken Mointing Ear

[Eyebillyo]

One mounting ear snapped off the overflow tube, now the flapper is all lopsided and needs to manually centered after flushing.
Should I snap off the other ear and get a flapper that just mounts over the tube?
The tube doesn’t look replaceable. Looks like it’s part of the whole tank.
Suggestions? Thank you

 

[voletl]

You can replace that tube.
Any Home Improvement store would sell it you can purchase a toilet rebuild kit it gives you everything you need including washers bolts new fill valve new flush valve a new flapper