Full set of used Brembo calipers found on eBay for just $390.00 complete for all four including shipping. Use Buy It Now before this steal is gone. I found one earlier and these prices are far from the norm.

Will fit 2004-2005 XJ8's as well as the same year XJR's on which they were standard.

04 05 Jaguar s Type XJ8 R Type 4 Piston Caliper Set | eBay