I just got an email from a place that has ammo in stock. Besides having a few of the usual suspects, they have .17 Mach 2, 5mm RFM, .218 Bee, 6mm Norma BR, .30-378 Weatherby Mag, 8mm Lebel Revolver, 33 Nosler, 9.3X62mm, .375 Ruger, .376 Steyr, .404 Jeffery, .450-400 N.E 3 inch AKA .400 Jeffery N.E., .416 Rigby, .416 Rem Mag, .416 Ruger, .500-416 N.E., .458 Win Mag, .458 Lott, .450 Rigby, .450 Nitro Express 3.25 inch, .470 N.E., and .500 N.E.. But mostly they have a wide variety of snap caps, plus plenty of choices in 10, 12, 20, and 28 gauge ammo.
https://globalordnance.com/ammunition/