Identity made the most detailed maps of New York City in the 1990s and 2000s.
New York Identity Midtown and Downtown maps published in 2005 are available for sale; so are Upper West Side Living and Upper East Side Living maps published in 1996 and 1997 respectively. These maps will not be updated.
You could also order online especially if your preferred payment is by check or if the maps are to be shipped outside of the United States. Identity shall follow up with an invoice for payment.