So while I do not have the results other than the winners in 89 and 90, here are the list of participants at the Marching Percussion Festival for 89 (the first year they held it) until 1992. Again, I do not know how long these continued after 92. The format for these events were very much like the winter indoor percussion competitions today.
1989
High School Division
Lebanon HS (Lebanon, IN)
Norwell HS (Ossian, IN)
Allegan HS (Allegan, MI)
South Spencer HS (Rockport, IN)
Plymouth Centennial HS [ie. Plymouth-Canton] Canton, MI
Union HS (Tulsa, OK) ** They Won
College Division
Miami University of Ohio
University of Texas at El Paso
1990
High School Division
Wyoming Park HS (Wyoming, MI)
Allegan HS (Allegan, MI)
South Spencer HS (Rockport, IN)
Dixie Heights HS (Edgewood, KY)
Hopkinsville HS (Hopkinsville, KY)
Portsmouth West HS (Portsmouth, OH)
Flushing HS (Flushing, MI)
Center Grove HS (Greenwood, IN) ** They Won
Jenison HS (Jenison, MI)
Norwell HS (Ossian, IN)
Westfield HS (Houston, TX)
Union HS (Tulsa, OK)
College Division
Miami University of Ohio
Northeast Missouri State University
Eastern Kentucky University
Western Illinois University
Michigan State University
1991
High School Division
Dixie Heights HS (Edgewood, KY)
Bedford-North Lawrence HS (Bedford, IN)
Hilliard HS (Hilliard, OH)
Greenbrier East HS (Lewisburg, WV)
Paul Harding HS (Forth Wayne, IN)
Normal Community HS (Normal, IL)
Illinois Valley Central HS (Chillicothe, IL)
Allegan HS (Allegan, MI)
Mona Shores HS (Muskegon, MI)
West Genesee HS (Camillus, NY)
Plymouth Centennial [ie Plymouth-Canton] (Canton, MI)
Jenison HS (Jenison, MI)
Bradford HS (Bradford, PA)
Center Grove HS (Greenwood, IN)
College Division
Northeast Missouri State University
Eastern Kentucky University
University of Iowa
Appalachian State University
University of Kentucky
James Madison University
Michigan State University
1992
High School Division
Dixie Heights HS (Edgewood, KY)
Castle HS (Newburgh, IN)
Mt Juliet HS (Mt Juliet, TN)
Franklin Central HS (Indianapolis, IN)
Muskegon HS (Muskegon, MI)
Northview HS (Brazil, IN)
Hudsonville HS (Hudsonville, MI)
Warsaw Community HS (Warsaw, IN)
Paul Harding HS (Forth Wayne, IN)
Plymouth Centennial [ie Plymouth-Canton] (Canton, MI)
Illinois Valley Central HS (Chillicothe, IL)
Jenison HS (Jenison, MI)
College Division
Illinois State University
Eastern Kentucky University
Michigan State University