Georg Luger developed the 9mm Parabellum cartridge, at the German company Deutschen Waffen-und Munitionsfabriken (DWM). Luger had originally developed the Luger pistol in a necked 7.65mm caliber. Upon request from the German Army for a more potent version of the Luger pistol, he simply removed the bottleneck of the 7.65 mm Luger cartridge and by doing this created a new 9 mm straight walled rimless cartridge now known as the 9mm Luger. It remains the standard pistol caliber for NATO and for the military in most other countries in the world.
New Production Ammo can be found manufactured by practically everyone.
Surplus Ammo - Found all over the place.
Reloading Dies are made by Dillon Precision , RCBS, Redding, and Lee Precision , to name a few.
Reloading components can be found at Huntington's, Midway USA , and the Wholesale Hunter , to name a few.
Brass - Almost all US manufactured ammo produces good once shot brass and components abound.