You can always extract it from NT4, just run this in the i386 folder:

  EXPAND.exe PINBALL.IN_ C:\PINBALL.INF

Take the list of files from there, and expand them, ex.

  EXPAND.exe PINBALL.EX_ C:\PINBALL\PINBALL.EXE
  EXPAND.exe PINBALL.HL_ C:\PINBALL\PINBALL.HLP
  REM etc.

If you don't have an ISO at hand or if you prefer to avoid extracting/expanding the files: https://archive.org/details/pinball.7z