Hello oswald_bs,
I don't think that is a customer replaceable item. You would need to call Support to find out: 1-800-821-2797.
I am attachng photos of R3 damaged housing and R3 good housing... on R3 you can see a small black plastic part is broken so i am getting an error and unable to staple booklets. can i replace the damaged staple housing?R2
R3