you can buy the white plastic clips on ebay, 12 quid last time i looked. this is the bits that wears most iirc, piece of cake to change once off the car.

I've got some in prefect condition in my shed i think. i stripped mine down when i fitted my b&m and these are redundant now. if you pm me your addy i'll post them off to you if you like, provided i can find them that is