the finis code for a saph lock set is

1661659 for a saph with central locking for upto 1990 price is £63.56 and

1667190 for a spah with central locking upto 1993 and the price is £70.55

if you strip the barrel down and get the key number the cost for ford to cut a key including the key is 6484853 and the price is 4.14

hope that helps