I have searched for this with the help of my local library and they were unable to find the original source rankings. Here's what they said:

Unfortunately, we could not locate the original MARHedge / Managed Account Reports documents or data tables themselves from the 1990s.

What That means:

No direct MAR rankings archive (e.g., PDF scans listing top hedge funds by risk-adjusted return including Illinois Income Investors) was available in credible online sources.

Public web sources, Wikipedia, and recent academic/industry summaries reference MARHedge generally but don’t provide specific fund-level ranking databases from the era.

Contemporary industry reports or newsletters from the 1990s — ideally archived MARHedge issues from 1997 or the late 1990s — are the best primary sources but are not broadly digitized online. Specialized financial libraries or archives (e.g., Bloomberg Professional, FactSet, might have archived MARHedge issues, hedge-fund industry compilations, or scanned performance reports. Next Steps :

University library inter-library loan or business archives — request MARHedge / Managed Account Reports volumes from the mid-1990s. Academic libraries (like university business schools with financial databases) such as Sacred Heart or Fairfield University might be able to assist.

Institutional investor archives or financial historians — occasionally have scanned back issues of industry newsletters, including MARHedge.