To track down scarce items, start with the folks at Southern Ammunition in South Carolina. Study their website and then spend a dime to talk with someone there.
Pat at Pat's Reloading is probably using some of this stuff as paperweights.
Wideners gets lots of different items.
Sarco--decades long procurer--could likely have what you want and might even find it if you could get them to look.
J & G Sales---ditto
I hope this info helps.
Nogo