I am looking at replacing the latch (and only the latch as the rest of the mechanism works fine) of our bathroom door. The latch has a part on the inside which is used to lock from inside and also an external part which has a slot in case one has to open it from outside. I am looking for this specific part only but can't seem to find it anywhere online. I don't want to replace the entire thing. Can anyone point me to where I can find the said part or set of parts? Thanks!