Help replacing an old/broken handleset

Hello, we have a couple of old sliding glass patio doors that the thumb latches have either broken off or due to years of use have simply worn away. I was hoping that you could help me identify a suitable (form, fit and function) handle set to replace these broken units with.

Thanks Dave.

I agree that that unit will most likely provide the best solution for our application here at the college.

In fact, I ordered two of them from Steve @ SWISCO yesterday and am looking forward to their arrival next week.

Best regards!