And what you can find is so fucking specialised. Just take a look at these wanted ads:
[font=Arial, Helvetica, sans-serif][size=-2]a female violinist who can also do sparse backing vocals at times when there are no strings (you will be one of 2 violinists)[/size][/font]
[font=Arial, Helvetica, sans-serif][size=-2]a person who plays both keyboards and a tenor-range brass instrument (trombone, french horn, etc.) For the keyboard side of this we'd prefer someone who is more interested in highly-effected, newer interesting timbres than someone who is really into MIDI versions of orchestral instruments.[/size][/font]
[font=Arial, Helvetica, sans-serif][size=-2]a bass player[/size][/font]
[font=Arial, Helvetica, sans-serif][size=-2]a live sound technician to join the band as a regular member (but to do ONLY live sound for us)[/size][/font]