I found it was cheaper to get brake parts in from the US than it was to source them locally. Check out ECS Tuning - they have brake pad/rotors selections to suit the Bora V6 4Motion even though they don't explicitely list it (since they didn't get it in the US).
What you want to look for is parts to suit the Audi TT Mk1 Quattro 225HP:
Audi TT MKI Quattro 225HP > Braking > OEM
The parts there will suit the Bora V6 4Motion.
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