put it together: sed

root@box:~# ls -l /dev/disk/by-id | egrep 'foo|bar|baz' | awk ‘{print $9}’ | sed ‘s#^#/dev/disk/by-id/#

/dev/disk/by-id/wwn-0x50014ee206fd9549 /dev/disk/by-id/wwn-0x50014ee206fd9550 /dev/disk/by-id/wwn-0x50014ee206fd9551