The lock on the door has had it and won't lock anymore. I'm looking at possibly replacing the handle and lock which will save a lot of money calling out the locksmith. I'm just wondering how hard it really is to do since I've not done it before.
Apparently these handles are no longer available. So I'm looking for a new handle that would fit the space of the current handle and lock mechanisms. Not sure if that exists? Perhaps also looking for something similar in the colour black.
I don't know if it would be better to get the locksmith or try a DIY?
Photos of handle and door below

