Here is an nice collection of trios from 1907, edited by Ravanello for liturgical use. It has vast amounts of good music, and some not so great music (you must decide!). For my part, I rather like them. We've done a number of these pieces. They are for all equal voices, so they can present voicing problems for mixed groups. Recently we've been putting tenors on top and then sopranos on the middle voice and bass on bottom. But this is a matter of taste. If you have all high voices or all low voices, this is not a problem.
Anyway, enjoy!