Clical trio for piano flute and boon? or piano and 2 flutes?

Go to www.fluteworld.com - and search in their very well-organized site. There are MANY good works - and whole lot of also-ran works - that will fit what you wish. Make sure to also look in related searches, like flute CELLO piano - tons there, too. And if your boonist wants a work that they can catch some rest - then there are Baroque sonatas in which they can play the b line in the continuo.