Oh man, I saw that video but had totally forgotten your mentioning the blunderbuss being used in a parody video. I thought, "Damn, how many people have sweet blunderbuss replicas?"
Yup, that was me. When I first saw the script, part of me was feeling a tad bit guilty for somewhat bastardizing Rian's amazing film...but all that went away when Rian himself approved of the clip via Twitter!
Sorry it took so long to reply...life's been pretty hectic between making and selling these blunderbusses and taking care of my new son.