Sillouhette mk 3 – Sails and rigging

I have just recently bought a Sillouhette mk 3 in reasonable condition plate in cabin says manufacturers number 1347 then loyds of london there is no mainsail and I dont know the sizes can any one help? Also where I can buy spares rigging etc would be most grateful amateur myself want to refurbish the boat any information would be appreciated ,hull is fine some small blisters but dry when opened not many inside is well neglected two berth not a good layout will change that soon.