You may want to contact Axiom for this, but I recall Amie mentionning they are currently designing a new T (for Thin) series to wall speakers. I have no idea what is the status/reality of this, but the W-series interests you, that T-one might be the right thing for you.

Check the topmost post at this page for origin of info:
http://www.axiomaudio.com/boards/ubbthreads.php?ubb=showflat&Main=12663&Number=174829#Post174829

See Mojo's signature