Ideal standard toilet pan and seat (OX13 Steventon)

Ideal Standard Concept Space close coupled back to wall toilet pan, horizontal outlet- projection 600mm. Slightly smaller than "normal" size which is about 660mm. Matching soft close seat and lid. Unused, ordered in error. Needs suitable cistern - Ideal Standard Concept Arc, part number E786001 is the one designed to go with it - and "donut" to fit between pan and cistern to keep it watertight.