I have a filing cabinet at home which my wife acquired when she started working from home recently for the council. The previous owner lost the key and wasn't really bothered but as my wife has work stuff in it now she wants a new lock on it.
It's a straight forward waifer lock with the number 252 embossed on it. I'm sure I could probably get a new key cut for it using this number but would like to know how to replace the whole lock. I can lock it for her using a pick and tension bar but that's no use to her when I'm away and she's no interest in learning to pick

So the questions are:
1. Can I get a new key cut using the number on it?
2. How do I replace the whole lock?
It's a simple lock (no security bar leading into the cabinet)
I have a good supply of locksmithing tools (not home-made) and have been picking for quite a while but strangely never thought of replacing this type of lock.
Appreciate any information you may have.
Oh, and by the way, I have used the search button and got 200+ returns but for some reason nothing which answers my specific question as it's not a picking problem.
Thanks.