Greg,
  I believe the band's Treasurer (Nancy Sheets?)  should have the EIN for CSB.
 I also did a Google search and found this link:

    http://apps.irs.gov/app/eos   

 then click  radio button "Are eligible to receive tax-deductible charitable contributions".
 Then type in the correct search fields. .. Name:   Cupertino Symphonic Band ..
    City:    Cupertino  ..  State:  CA ..
 Then click [ Search ] button ..

   I did this and got:  
          EIN:  93-1055362 
   Nancy needs to confirm this...
Fred  9/25/15