Hello.
I bought the last paper available directly from Agfa, 16 big rolls and several boxes of 20x24, in May 2006. The production ended presumably in early 2006, late 2005. I believe that unless kept frozen at very low temp any MCC left around is fogged.
It was my primary paper choice for my lab from mid 90's till the end and i used tons (literally) of it.
The paper was excellent and widely used in fine arts, with no special issues. The Sistan (now called AG stab) is a clever product to protect any silver based photo material, either paper or film, regardless of manufacture.
The actual Adox MCC-110 is quite close to the original Agfa MCC.