Oh, I didn't pay for it, it was free! Let me explain.
You see, the butchers at some grocery stores get the ribeyes (and many other cuts of meat) in a whole huge slab from their distributor. Then they trim it and cut it into steaks for their customers. The leftover fat is discarded, but really most butchers take that stuff home. ;)
My local privately owned grocer does this, and also the Kroger grocery chain. (BTW, I love Kroger. They must have a strict hospitality policy, because all their employees are always so happy, and nice, and polite.)
So, all you do is go to the butcher area and ask em if they have fat trimmings. The butcher will ask how much do you want. Then he'll package it up real nice for you, weigh it, and give it to you for free!