They aren't the only "Arsenal Reissue" cartouche stampers. If there is a buck to be made, they'll do it.
Tom Findley does it.
Shufflin Parkerizing does it.
Whatever you want, just ask (for a price) and it's all justified as a "restoration."
True, but Shufflin also burns into the wood that its a reproduction. Check out his site, he states that so someone cannot pass it off as original someday down the road.