Here are some quotations using this word, taken from http://dictionary.reference.com/wordoftheday/archive/2002/10/29.html:
Meanwhile, a poor
copy was erected in the courtyard; many an unsuspecting traveler paid homage
to that ersatz masterpiece.
--Edith Pearlman, "Girl and Marble Boy," The Atlantic , December 29, 1999
All we can create
in that way is an ersatz culture, the synthetic product of those factories
we call variously universities, colleges or museums.
--Sir Herbert Read, The Philosophy of Modern Art
Then there was
the sheaf of hostile letters larded with ersatz sympathy, strained sarcasm
or pure spite.
--"Time for GAA to become a persuader," Irish Times , Monday, April 13, 1998