Inspiron 8000 Palm Rest Assembly

 I have an Inspiron 8000, whose lower left click pad is broken (stuck down, doesn't spring back-my kid wacked it). Do I have to replace the entire Palm Rest Assembly to fix this problem? And if I do, do you buy the part through Dell or a third party reseller. Are there any repair shops that do this sort of thing in Washington DC or Annapolis, MD.

 

Thanks.