Im nearly ready to get the sills onto my Z3 and have been getting new clips and bolts for the job. Two of the bolts needed to be grinded off and the Prestol-cage came off on both. So need two. These are showing as minimum £7 each on Ebay, where I was originally looking for all the bolts,clips etc. I checked with Group1 BMW Lincoln (was Sopers) and they are 15p each, only problem had to buy 10 haha. So ended up getting everything I needed from them instead of Ebay (except the trim clips). Always check prices with BMW.