Here is the full Monteverdi Mass in F, a piece that would be accessible for well-rehearsed parish schola. I recall that after this Mass, on the last day of the Colloquium, someone said, you know, the first tenors sounded tired. I had been singing that part (standing next to Don Roy) so of course I was a bit taken aback, but now listening I sort of see the point. We seem to be singing on the lower end of those high Gs and As! It makes sense after what must have been 40 hours of singing. On the other hand, the sopranos all sound strong and bright.
Kyrie
Gloria
Sanctus
Benedictus
Agnus
(Yes, we did split the Sanctus and Benedictus, in the ordinary form)