Sleipner,
I think what is listed in that "parts list" excel file should cover you pretty well - I think it would be rare for you to exceed those numbers of units.
The production limits that each nation has also keeps it in check - for example, it would take Germany 2 years (8 turns) to churn out two carrier groups - so you probably don't need too many German carrier pieces. I think in the last 20 games I have played, Germany has maybe built one carrier once.
But, that will of course change when I get to play Yoper and the kriegsmarine floods the Atlantic with flat-tops and darkens the skies over New York with carrier aircraft. . .