Theres a Cdn 10cwt trailer available as a buy-it-now. For just 2K (and US$ at that) you can have one for your own, except missing the towing attachment, has civilian tires, and has the tailgate cut out.
http://cgi.ebay.com/ws/eBayISAPI.dll...080923323&rd=1
Still, a neat piece. I can't say as I've ever run in to one.