It's not too difficult to replace yourself, just buy the part. Getting it apart without a bolt tool is supposed to be sorta tricky but they said that about the Garand bolt and I did it with a pen.
If it's a CMP gun, contact them and explain what happened. They sent me a new firing pin for the M-1 Garand I bought and the basic response was " these are old guns and that is bound to happen." Cost to me = $0.