Dominic Reeves:

>I've been looking for a recording of Sun Treader for years - Tilson
>Thomas once conducted a great one, but I can't seem to find this
>anywhere.

I don't believe the MTT recording is available, at least in the US.
However, I recently reviewed a London recording with Dohnanyi and the
Cleveland Orchestra.  Should be available in the archives at
http://www.classical.net/

You can find at least one other review of this recording at www.amazon.com.
It's also a rave.

Steve Schwartz