There are plenty of great contemporary rock bands. But what's the point of posting 'They should make an Elder pin' or 'Graveyard would make a cool pin' when nobody will know wtf you are talking about?
Stern needs to sell pins, and the people who buy NIB still listen to classic rock. So that's what Stern will make. But, it doesn't mean that there are no good contemporary rock bands. Quite the contrary, there is way more rock music being made now than in its heyday.