I think we're missing the point a little bit. While home canning is definitely healthier and cheaper, it's not what the intended recipient wants or necessarily likes. The intended recipient wants/likes Libby's potted meat. And the package size might be ideal for his needs. Larger amounts might be too much to use up before it goes bad.
When I was growing up, Mom bought the Armour potted meat. Not my favorite and I haven't bought it for myself ever. But people do like it, and prefer the way one manufacturer makes it over what another does, just like any other available grocery item.
Possibly the only feasible way to get it is online now. It's worth looking into.