TubeNet

The Horovitz is available on hire only with small chamber orchestra from Novello Music in the UK.

Roger May has a fine Concerto premiered a few years ago;
http://www.rogermay.co.uk/listen.html

and Joe Miserendino is putting the final touches to the orchestra version of his Willson Concertante for me;

http://www.joesmusicroom.com/

He also has versions of his Euphonium works available with string orchestra, as does Terry Treherne;

http://www.euph9.freeserve.co.uk/terry.htm

CB

Adam Frey has a nice list of orchestral repertoire on his website, which you can find here:

http://www.euphonium.com/OrchestralRepertoire.htm

Most of these are available from major retailers around the internet, and most of the time the orchestral acc. parts are rental only.

Hope this helps.

- Pat Stuckemeyer