You can try Springfield, the CMP web site, Numrich Gun Parts or a local gun show. It depends on what model gun and how old it is, but parts are generally available for most of their guns. Try doing a web search for the part or parts suppliers.
try: dixiegunworks.com
which Springfield? The military arsenal, or the civilian company?
The correct ammunition is 30-06 Springfield.
Springfield
the Springfield rifles fired round bullets or bucks.
Springfield is the manufacturer. A rifle is a long arm with a rifled barrel. A carbine is a short rifle, generally considered having a barrel length of 20 inches or less. All carbines are rifles but not all rifles are carbines.
The first Springfield Trapdoor rifles, built right after the civil war and often converted from the older Springfield rifled muskets, were .50 caliber, but the later versions were .45
You will have to go online and do a search for "Airgun repair " and locate someone who can repair it for you. ( OR ) This rifle is not that old and normally Crosman has parts for it but this model is not one of the rifles that Crosman has parts onhand, but they do offer a service to locate repair shops that work on Crosman rifles.See the link below
1903 Springfield 30-06
Their are many websites that have detailed records of what sarial number rifles were built in what month of what year by each manufacturer. These sites are very easy to locate with a simple google search of "M1 garand".
Springfield Rifles (NAFL)Kennedy Stadium516 W. Meadowmere St.Springfield MOPhone: 417-831-6822
I have a Springfield model 187S .22 LR (semi-Auto, tube feed).