  Using a slight modification of an argument of Croot, Ruzsa and Schoen we
establish a quantitative result on the existence of a dilated copy of any given
configuration of integer points in sparse difference sets. More precisely,
given any configuration $\{v_1,...,v_\ell\}$ of vectors in $\mathbb{Z}^d$, we
show that if $A\subset[1,N]^d$ with $|A|/N^d\geq C N^{-1/\ell}$, then there
necessarily exists $r\ne0$ such that $\{rv_1, ...,rv_\ell\}\subseteq A-A$.
