Those YUA limited repros have long since be SOLD 
OUT! I've been looking for over three years for some of 
the first version, but no dealers have them. And yeah, 
they are offered as a set but it's not required for  you to 
buy them as such. When I bought mine I only bought 
one, but... I also spent over 1k combined with the other 
merchandise, so, maybe buying them individually (if 
you can even FIND ANY) is not an option.