handle latch and keeper assistance

I have Herculite Sliding Patio Door (Anderson) from the 1980s. I have a universal handle which works fine except the latch is not long enough (3/4"). The original latch, which I am still using, is in very poor condition, is just over 1". Also I believe the mortise lock is broken. Can you help me identify parts to fix latch/lock until I can replace door.

In looking further at SWISCO website, I found what I believe may work. Door handle 82-035 (bronze) appears to be similar to original door handle and 82-211 appears to look like mortise latch and keeper. Is it possible to buy only tooth for latch and keeper or is it better to replace. I did some measuring and these items seem to fit my needs. Do you think these items will work?

Thank you for your assistance!

I ordered above parts. Door handle and lock and keeper are working fine. However, the standard latch is not long enough. I had to use old latch which is 1/2 inch longer to make it work. Can you recommend a longer than standard latch that would fit parts I just ordered? A photo of new and old latch is attached. Thank you for sharing your expertise.