I'm not aware of any other libraries for Aria than Garritan, but perhaps someone else can jump in if they do.
Finale can work with any VSTi sample library, it's just that you need to create your own set of Human Playback preferences to get the proper articulation switching. What would your typical orchestration be? I'll look at what's around based on that.
Note that some libraries require a full version of the Kontakt sample player, which would be an additional cost. Others can use the free Kontakt player, and still others have their own (free) player.
Finale 25, Overture 5, Sibelius 8, Notion 6, Cubase 8.5
Win10 x64, 32GB RAM, Focusrite Scarlett 18i20
Kontakt, VSL VI Pro, VE Pro, EWQL Orch, Choirs and Pianos
August Foster 190