Vinyl sliding door latch replacement

I am attempting to replace a broken sliding glass door latch. I discovered, after removing interior/exterior handles and some screws, the mechanism would not pull out and when I let go the latch plummeted down into the frame. It turns out that the screws to adjust the rollers are totally stripped, so removing the door could be a lot of work, I'd rather avoid that if possible.

I have learned that with many of these mortise latches, you have to remove the door to replace them anyway. I am trying to get a sense if this is common? It seems that on the top and bottom of the mechanism is a tab with a screw hole, I did not see those when initially trying to remove it, they must be somehow under the vinyl exterior?

Based on my brief struggle with the latch, I believe it to be generally similar to the 82-218.

The door frame seems to be vinyl with a metal structural 'frame' underneath. How the heck does one install a new latch if some part of this has to be dismantled?

Thanks for the reply, Dave. You've put my mind at ease about the 'dropped' mortise lock. So far, the door seems to slide just fine, so I don't think it has harmed anything.

Do you have any suggestions on choosing the right replacement mortise lock? I didn't get much of a look at the original before it fell. I've photographed the lock hole and catch, if that could be at all informative?

Thanks again,
Michael

THe screws in the latch holes on my vinyl sliding door are stripped out. What would be a good fix?

Is there any solution to this? As you can see, the top , where the screw should be secured is broken. Thank you.

Thanks for info so far. I've got the replacement lock. Do I have to remove the door handles to do the lock replacement or can I leave them in place?

I figured it out. I had to remove the handles. I made the replacement, but the lock seems stiff and hard to engage when locking.