I was wondering if any of these are available out there used (in C) ? All I can find are the standard "Wiener" German style in C. What I'd like is the Black one (HA-114 B - designated "Cajun" w/"Cajun tuning"), just like Marc Savoy's in his & Tracy's 1st Cajun Accordion instructional video (circ 1990). Any help on this would be appreciated.

They did not have "Cajun" tuning.

They were simply "drier" than the usual wet syrupy Hohner tuning.
Bellows tape was thicker, Italian style.