A plethora of Relationship-Based Access Control (ReBAC) models have been proposed, varying in the types of policies they can express. This fragmentation has stifled the creation of a benchmark to directly compare the performance of ReBAC systems based on their common supported policies. To solve this problem, we propose RACON, a schema-driven, customisable ReBAC policy generator. RACON generates policies in an intermediate language subsuming the features required to encode existing ReBAC models. This language can subsequently be translated to popular ReBAC policy languages through an extensible translation module. Taking a view of ReBAC policies as graph queries, we implement translations into two popular graph query languages, namely Cypher and SPARQL.