There was a spreadsheet long ago, which listed most games up to Fall of France. I don't recall where I found it, but I think it was this site.
Likely the best way would be to go to the
BGG Panzer Grenadier page and look lookup the game in question. There are scans of the countersheets on most of the game pages. To verify the leaders, go to the
Impartial Leader Selector tool. It has a list of leaders used in each game. Just keep in mind that a leader list for an expansion will include the leaders from the supporting games.