Assuming the current living vice presidents match Mondale's longevity:
Dick Cheney: May 15, 2034
Joe Biden: March 4, 2036
Dan Quayle: May 19, 2040
Al Gore: July 14, 2041
Mike Pence: September 19, 2052
Kamala Harris: February 2, 2058
Between Cheney-to-Gore + Bubba/Dubya/Trump, we may be in for a slew of POTUS/VP deaths in the 2030s and 2040s.
That's the thing about having so many presidents and VP's born close together. 4/5 of the past presidents and 4/6 (counting Biden) of the past VP's were born in the 1940s. Add in three more unsuccessful pres nominees. Since most of them are decently healthy for their age and obviously the fame+wealth+great healthcare benefit adds a few years to your life I'd expect them all to live a while longer but the human body can only go so far.