Giant has them too. They seem to always have the box but occasionally I've seen them stock the whole pork roll in a sock.

Sadly (because it's gone now) there used to be a seriously old school Baltimore restaurant called "Burkes" which was located at 36 Light Street (there's still a pin on Google Maps, oddly enough) that had a pretty good breakfast. So do some other greasy spoons in Baltimore. So what? Well, it's the only place in my life I've ever been to where ordering a side of pork roll resulted in being handed a plate with -- and I'm not kidding about this-- at least 10 pieces of pork roll for something like $2.50! Maybe there's a reason they went out of business...