I m a chypre queen and I m a purist which means chypre is about oakmoss and not substitutes.
my solution? I go for vintage, period.
Mitsouko any concentrations provided it 's a vintage
Givenchy III, green chypre, vintage very hard to find and very expensive
Miss Dior, another green chypre and also hard to find in vintage
Diorella, the most beautiful spring summer chypre
Cristalle EDT, although not as "chypre"as Diorella