Need some help with research

Looking for a little help from someone with an Ancestry.com subscription. I am told that the old Polk City directories are on Ancestry. Here are the issues, concerning the year 1991:

  1. In and around late 1991, residence and/or ownership of 419 Sable Street, Alpena, MI.
  2. Ownership of nearby building 305 5th Avenue (corner of Sable and 5th Avenue). This building was later known as Fifth Avenue Antique (2010), but in 1991 was called something different.

If you have a subscription and a little time, the help would be appreciated. Know that I am passing it on to someone who is taking the deeper dive with this information.