Midway USA carries it- but pricier than hell. Check auctions at gunbroker.com and auction arms.com, just use 7.7 and ammunition category. It is properly 7.7 Arisaka, but is listed as 7.7 Jap by folks that flunked PC school. Yu can probably get it through Cabellas, Bass Pro Shop, and Gander Mountain.
What we have heah is.... failure to communicate.