I am having the same problem with the hinge pin/bolt as kosttade - QC 35II spare parts. The pin/bolt for the right ear cup came out and all I need is a replacement pin and bolt. Customer service is trying to get me to but a replacement headset at $260 when all I need is a part that is at most $5. How do I go about getting this replacement part? Is there a service center in Atlanta, GA?