Dr J.Stevenson's research assistant wrote:
> 
> where there more available?

I remember seeing copies of the IRCAM book at Half Price Books, a chain
that has several stores here in Seattle and on the West Coast. If you
have a Half Price Books near you, give it a try, as they often carry
these remaindered academic books. I purchased a copy of The Archaeology
of Music in Ancient China there (a fascinating book, documenting several
thousand years of bell design, lithophones, etc. in China).