* Savage Arms Website: Start here. Check their support or customer service section. While they may not have the manual online, they might be able to provide information or point you in the right direction. They may also have contact information for authorized service centers who might have access to older manuals.
* Numrich Gun Parts (GunParts Corp): This is a large supplier of gun parts. They often have exploded diagrams (parts breakdowns) and may have manuals available, or at least know where to find them. Their website is a good place to search using the model number.
* eBay or GunBroker: Sometimes you can find manuals or parts lists for sale on these auction sites. Search for "Savage Model 30 .410 manual" or "Savage Model 30 parts diagram." Be aware that prices can vary significantly.
* Online Forums: Gun forums dedicated to shotguns or Savage Arms specifically could be helpful. Members might have a manual they can scan and share, or have experience with similar models and know where to find information.
* Antique Gun Shops: Local antique or used gun shops may have access to older manuals or know of resources for finding them. They also might be able to identify the exact model variation you have (sometimes there are subtle differences within a model series).
Important Note: When searching, be as specific as possible with the model number. The "Model 30 series K .410" is a good start, but if you can find any additional markings or numbers on the shotgun itself (often found on the barrel or receiver), it will greatly improve your chances of finding the correct manual and parts breakdown.