“Sharon’s music is available on these main providers, as well as over 50 download services, so just type in “Sharon West” to see if it’s available on any you currently use”:

Licensing Commercial Use of Sharon's Music License Sharon's music for commercial use through Pump Audio.
Downloads from iTunes Purchase the Album or Individual Tracks through Apple's iTunes Music Download Service - Click Here to Order from iTunes
Downloads from Napster Purchase the Album or Individual Tracks through Napster - Please type in "Sharon West" as the Artist to download her music at Napster - Click Here to Order from Napster
Downloads from Broadjam Broadjam is an international web community for musicians and their friends. - Click Here to Order from Broadjam

Additional Download Services offering Sharon West's Music: 

Rhapsody
MP3tunes
Zune 
Audio Lunchbox