Brackets aren't expensive Tino. Ohlins will have them available, just specify the ones for 05 onwards STi and they'll work.

Alternatively, find out the diameter and thread pitch of the strut. Depending what it is, I could even supply you some HSD ones if they fit.. Basically a threaded tube with 2 plates welded on, and abs sensor and brake line mounts. Budget 100ish for those, as opposed to LFs hourly rate to do the job.