I have a 1972 United Gateway Arch shuffle alley to part out. PM if you need anything. It may have parts similar/or also used in the following United/Williams Shuffle Alleys:
1971:
Cimarron Shuffle Alley
Times Square Shuffle Alley
Liberty Bell Shuffle Alley
1972:
Windy City Shuffle Alley
French Quarter Shuffle Alley
Gateway Arch Shuffle Alley
Astrodome Shuffle Alley
Cape Cod Shuffle Alley
1973:
Las Vegas
Twin Cities Shuffle Alley
Royal Hawaiian Shuffle Alley
1974:
Pinnacle Shuffle Alley
Golden Triangle Shuffle Alley
Granite Shuffle Alley
Civic Center shuffle Alley
Unique Shuffle Alley