Not sure if I'd like to skimp on unbranded ones off eBay James, but it's your choice! I have 2 sets of locking bolts on my car, a set of McGard, and a set of Beemec, the Beemec are a fair bit cheaper than McGard bit still very good, they also make very good spacers. The last set of extended wheel bolts and locking bolts I had on my old 8L S3 were all Beemec.
Might be worth looking them up!