Lost small usb for controller

My son lost the tiny usb dongle for his aftershock ps3 controller Tried to contact PDP to purchase a replacement but unable to get through on the phone and been waiting two week for email response after being told my question needed to be escalated to level two tech support - to purchase a replacement dongle - really?

Now I give up and am going to just buy a new unit but don't want him to lose this too. Is there a plastic or rubber cover I can put on the end of it to make it bigger/ more noticeable so it won't be lost as easily