Wendy,
The Collected Poems of Henri Coulette, edited by Robert Mezey and Donald Justice, is available from the University of Arkansas Press. Your bookstore or an online bookseller can get it for you, though it might take a few weeks. The U. of Ark. Press is not speedy when it comes to marketing and distribution.
Selections from Coulette's metrical poetry may be found in the archives (Spring, Summer and Autumn 2000 issues) of <A HREF=http://www.traditional-poetry.org>The Susquehanna Quarterly</A>.
G.