#1 and 3 are correct. 'Nowadays' is an adverb in both cases, with an elided clause ('they do') in #1.
#2 does not work unless you are instancing costumes with other items: 'Actors didn't wear period costumes like Roman togas or Elizabethen ruffs'.
PS: To be thorough, I should add that you will certainly hear your #2, but it should be avoided in careful writing.
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