: Sir James Galway sought a work that would showcase both the technical brilliance and the "singing" quality of the flute. Liebermann delivered a piece so successful that it won the 1994 National Flute Association Competition for Best New Newly Published Work.
Typing the exact keyword into Google will yield mixed results. You might land on a shady Russian sheet music site, a defunct Tumblr blog, or a Reddit thread where a user posted a Dropbox link that has since been disabled.
: A high-energy, virtuoso rondo that showcases the soloist's technical agility, culminating in a blistering Prestissimo Just Flutes Instrumentation The work is scored for a substantial orchestra, including: Just Flutes
The concerto you're referring to is likely the "Concerto for Flute and Orchestra" by Lowell Liebermann. It's a popular and beautiful piece for flute and orchestra.