A common question on "paleo" diet blogs is how to get grass fed beef with enough fat.
A good source of fatty ground beef is US Wellness Meats. You can get 75-25 ground beef in bulk, 25lbs, and you get a small discount. It's the tastiest meat I have found. And since it comes frozen neatly in nice little packages, it lasts a long time and is very convenient. They also have tallow and lard and butter. I cook my meat (I like it raw too) in tallow and then if some of the fat is still left over in the plate or bowl I just go ahead and drink it down. It seems gross at first but you get used to it and will come to like it. Frozen tallow chips are good, too.
It is also possible, but less easy, to find raw fat. Ranchers often won't sell it to you but look around and you might find a nice rancher to sell you the fat. And since they usually freeze their meats, you can might get a good amount of fat, frozen, and so it will last a long time.
