Are there any supplements for Sengoku?

In planning out a new game, I stumbled over Sengoku by Gold Rush Games. Presenting a very historically accurate baseline with the options to play any facette of feudal Japanese society and adding magic, monsters and anime playstyle depending on the player’s wishes intrigued me.

However, I only could find the core rules have been made in 1999, that there is a revised edition of 2002 and that one of the authors – Anthony J Bryant, a researcher of Japanese feudal topics – passed away.

Did any supplements for Sengoku ever made it to print?