I have a pair of NOS Girling 16/4 brake calipers. Pretty much the standard of the late '60s/70s prototype world including GT40. They are the type with the bolts drilled (for weight) and come with a set of pads of unknown origin. Not new replicas. I will send pictures to anyone who emails me at geneulm at pos dot org.
$2k shipped anywhere CONUS
$2k shipped anywhere CONUS