Historical Board Gaming has everything you need. In the event you want a lot more pieces of all types (say if you don’t want to use chips anymore), you can buy Axis and Allies 1942 to cannibalise the pieces (assuming you’re playing Global 1940, and this works vice versa).
––If you should end up with a surplus of the “cardboard airbase markers” I would be interested in buying them from you. And you can almost always find some A&A-Guadalcanal games on Ebay, just wait for some at your right price.
