Hi Bren, have a look on eBay or alternatively go to your local spares shop they should be able to get them from the Reg/VIN they are around about £15 quid from memory, it goes without saying the previous owner had the leak and obviously thought over tightening the flange bolt was better than buying a new set of gaskets then all his learned mates wound him up down the boozer about the cost of the repair so he sold the car.
Steve.