We consider the parametric reachability problem ( \(\textsf{PRP}\) ) for families of networks described by vertex-replacement (VR) graph grammars, where network nodes run replicas of finite-state processes that communicate via binary handshaking. We show that the \(\textsf{PRP}\) problem for VR grammars can be effectively reduced to the \(\textsf{PRP}\) problem for hyperedge-replacement (HR) grammars, at the cost of introducing extra edges for routing messages. This transformation is motivated by the existence of several parametric verification techniques for families of networks specified by HR grammars, or similar inductive formalisms. Our reduction enables applying the verification techniques for HR systems to systems with dense architectures, such as user-specified cliques and multi-partite graphs.