Details for Black Diamond Brakes are:
Postal Address:
Black Diamond Performance
Unit 4
Telletholme Industrial Estate
Tollgate Road
Burscough
Lancashire
L40 8RT
Telephone:
01704 893939
Fax:
01704 893899
Email:
sales@blackdiamondperformance.com
Not sure about direct buying but www.europerformance.co.uk stock them.
Going off the fitment guide it looks like they are facelift only:
Galant (97->) VR-4 2.5 V6 Twin Turbo 24v (EC5A) 10/99-01 F-V KBD 978 294 24 22.4 -
Galant (97->) VR-4 2.5 V6 Twin Turbo 24v (EC5A) Rear Disc 10/99-01 R-V KBD 1045 284 20 18.4 -