You can get in contact with him by attending any of the knife shows where Microtech is present, usually the larger shows. Blade, SHOT, etc.
Seeing as he is a public figure (sort of), his contact information is not classified by a long shot.
When it comes to he said, she said situations much like this one, it's simply one side of the story. It's impossible to know what transpired to cause someone to cuss you out for 30 full seconds. Yes, some people are jerks but I have found that it usually takes a while to piss someone off to the point where that happens. Those kinds of personalities are also usually not allowed to field incoming telephone calls. It's also impossible to know how the box was packaged or if it was broken into along the way.
So, at this point we know when you mail anything of value, you send it signature confirmation, you insure it for the full value, and you make sure you secure the package with a whole lot of tape. Make the box indestructible and tamper resistant, photograph or made a video of the box before shipping. Anyway, what I am saying is that there are a lot of holes in the store thus far.