One and Two Rotor Mazda engines by Duncan Aviation Engines built in the 1980's

Hopefully I'm posting to the correct forum. I'm looking for info about the One and Two Rotor Mazda engines by Duncan Aviation Engines built in the 1980's. They had originally been based out of Comanche, Oklahoma and then moved to Canada I believe. I understand they built about 250 total and were fuel injected and had a belt type PSRU. Anyone heard of them, know about them, maybe own one, can possibly point me in the direction of articles/info about them and the engines? They supposedly attended Oshkosh with displays and speaking forums sometime in the late `80's early `90's apparently enough before the internet that I have been unsuccessful in finding anything more than this so far. Thanks, Greg