Company information needed!

[Skylark]

Hi! ^_^

I'm thinking about doing a Brandon Heat/Beyond the Grave cosplay this year and happened to find out that a certain comapny called Dai Nippon Gaiken made a life-size replica of Grave's guns Cerberus. Unfortunately I can't seem to find any type of store they might have, as I know they've sold these items before. I was wondering if anyone knew such information or if you've seen them elsewhere and where I may be able to purchase said items?

Also, would they be con-legal?