New to collecting and a bit confused on some of the unicornos and where to find them.

I recently started collecting tokidoki unicornos. I am in love with a majority of the series I see but I don't want every series. I'd love to purchase some of the fairy unicornos, zodiac unicorno, and candy unicorno blind boxes. I've currently found one candy unicorno. No matter how long I search I can't find any on the tokidoki website. Are these series discontinued? Do they frequently discontinue series? If they are discontinued where could I possibly find some of them? Please help me figure this out so I can continue to happily collect the unicornos.