Why don't you approach this like a group buy? Contact a local security personnel, give him details and get him to call round to collect all the stuff. Failing that, a solicitors letter representing the forum as whole should work. Would the guys that run the forum not have an interest in this as all contact seems to have been through the forum?
I'm only throwing ideas out there, but I know how I would feel if I were involved. I very nearly was, I had a number of items to send his way but then this thread started.