New York State Comptroller (http://www.pipl.com/cache/?N=10.4.25.134&S=200912051116327200000000640834087 0201&P=NCSC7_23622.htm - broken link) ~ They can't locate him either.
I could not find him on the Social Security Death Index. But not everybody shows up in the index. Maybe you could try nursing homes in Brooklyn.
There is a Douglas R Eschner in Ansbury Park, NJ ~ Age:50
Perhaps his son?
Also saw this...
http://erinfeinberg.com/2009/09/10/american-voter/ Scroll through the names to see Douglas Eschner.