New fogs are a grey area,some say not available ,but I know one member bought a set from BMW mini ,let me explain ,mini coopers from the same era fitted the same lights. Second hand wise a good condition set can sell for £200 plus, am told new ones purchased from mini were only £100.00 . The sill covers I expect are side skirts ,these do come up for sale on eBay second hand,will prob need painting,lock sets again come up on eBay. Nice car by the way good luck.