I live in a rural area so guess I'm really lucky. I'm close to 3 excellent butcher shops (20 minutes' drive) and I've been able to get everything from chuck-eye and hanger steaks to whole pigs and lambs at these shops. One of these shops deals in prepackaged meat and primal cuts but the other two have their own slaughterhouses so you can order anything you like including the big warehouse packs like Black Earth Meats does in the article. (Assuming, of course, that the butcher hasn't squirreled away the chuck-eyes and other treasures for himself).
Sometimes it also pays to get to know your butcher at your local supermarket, too. A couple of months ago I dropped by my local Safeway and they had "bottom sirloin steaks" sliced up and for sale at a good price, so I asked the butcher if he had any whole tri-tips as well. The guy knew his meat really well so he packaged me up a couple of whole tri-tips at an even better price (because they weren't sliced and he had to do less work). I went back last week and got a few chuck-eye roasts that I've cut into steaks. So in some cases, it's a good idea to check supermarkets as well as they can sometimes have the odd cuts too.