Replacing my slider door lock to keyed lock

I'm not convinced that the 82-081 can work for you. The installation holes on your handle set are very different from ours. They look like they're spaced further apart and they're going right through the pull itself, whereas the screws for the 82-081 come in from the sides. Can you confirm the hole spacing there?

As for what other parts you need, that would depend on what's broken. Assuming your mortise and keeper are still working, then you can just reuse them. That is of course only if the mortise is compatible with the 82-080, which I'm not sure about. I would like to see a photo of it out of the door if possible.

So, if the screw spacing on the handle is 4-15/16", then that has increased the odds that our 82-081 will work. I still need a clear photo of the mortise lock out of the door, though. Let me know if you can do that for me.

Perfect, thank you! So, that looks like our 82-269, which cinches it as far as I'm concerned. The 82-269 mortise is specifically designed to work with the 82-081. I now believe firmly that this handle set is what you want.

Assuming your mortise lock is in good condition, you can continue to reuse it. I only wanted to see it to make sure that our 82-081 is compatible, which it is. The 82-081 also already comes with a key lock, so there's no reason to buy that separately. From what I see, the only part you need is the 82-081.