This post references it in the UK market:
http://www.ft86club.com/forums/showp...&postcount=389
This post talks about a member getting it in America from his local Subaru dealer:
http://www.ft86club.com/forums/showp...&postcount=360
The thread where these posts came from also talks about the 1 character difference in "ZA1JA01C" as simply being the region in which the reflash was released.
I will attempt to confirm that I've received the reflash on Saturday from Folsom Lake Scion.