I'm looking for cartidges for a display

Can anyone recommend a good source to get period cartridges. I'm looking for actual military issue from WWI or WWII or both. I'd like to get all or most from the same place if possible. Only want 1 of each type.

This is what I have:

British 303 WWII
Soviet 7.62x54 WWII
US 45 Auto WWII

I need everything else. Priorities would be:

German 8mm, and 9mm Luger
Both Italian Carcano's
Both Japanese Arisaka's
French Lebel and MAS 36
US 30-06 and 30 carbine
Swiss 7.5
Steyr original and reworked
Soviet Nagant revolver

Not looking for "rare" pieces, just an example for each.

The majority of mine have come from gun shows, old gunshops and flea markets. Pawing through those trays of old loose ammo can produce some interesting items for a cartridge collection.

FWIW, there are two good cartridge shows in PA where you can easily find all of those, and much more. They are in Williamsport (June) and Morgantown (Aug.).