Its not the lock i wouldn’t have thought (as in where the key goes in) they are just a barrel that go through the mechanism. Your mechanism will be buggered as mine is.
Remove handles – that will expose a bar between handles – remove that thats where the square hole is in the image below.
Remove all screws in the edge of the door top to bottom – one of the screws (the big hole in the edge on the image below) holds the lock mechanism in place- remove this and pull your barrel out of the keyhole shaped area – this is what your keys turn. This is just a universal part.
You will need to measure the depth of the mechanism area and total length of the strip – also look for any manufacturer markings to help you identify. Then get on ebay and have a look there are loads of them
If you can operate a screwdriver you will have no problem.