Dear Debbie,
I called the Library of Michigan (LOM) and they have the Plain Dealer from 1889-1893 according to their website but it may be that they do not have all the issues published during that time period. The LOM also has the main Detroit newspapers. If you go the the following:
http://www.michigan.gov/libraryofmichiganThen click on the "Library A-Z". It is on the teal colored section under the library's logo. Select "N" to get to the newspapers and then select Wayne County.
The library does not do research but does have a list of researchers on their website. In the A-Z, select "R", then Researchers ( Michigan Genealogy Research Network) and then scroll down to Professional researchers until you get to those in Ingham County. The library in located in Lansing which is in Ingham County.
The librarian couldn't give me reference but she does know several of the researchers and they are quite good. You could probably email them to at least get their fees.
Georgia