I get lots of requests for the solo part to Apex in various different keys and clefs (including for the Chinese Er-hu). So I have put them all in to one, free, downloadable file.
For the wind orchestra file, please head here: http://www.petermeechanmusic.co.uk/catalogue/apex/
For the brass band file, please head here: http://www.petermeechanmusic.co.uk/catalogue/apex-2/