You can certainly get the old one out, but may have problems finding an exact replacement without having to replace the whole drain as well. It can be done, but not always easy.
You'd want to post a picture so there's a chance someone can identify it and let you know if there's a replacement. You'd likely need access to underneath as well.
To get the old one out, you'd likely need a hacksaw to cut a notch, then use a chisel and hammer to try to unscrew it. If that doesn't work, you'd take out a small section, then peal the old one out. Doing this without compromising the existing threads of the shoe may be beyond your skill level.