We don't have synonyms for hepster yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are hipster, shepster and heister.
(n) :
Dated form of hipster (“follower of the latest trends, fashions, styles, such as jazz and Bohemian culture at the time of usage”). [A person who is keenly interested in the latest trends or fashions.]
(n) :
Dated form of hipster (“follower of the latest trends, fashions, styles, such as jazz and Bohemian culture at the time of usage”). [A person who is keenly interested in the latest trends or fashions.]