Do you need Big Reds specifically? I have a set of Turbo S calipers which would be the 928GTS calipers.
They have a special heat dissipating coating that reduces temperature 20% better than bare aluminum. I'm not sure but I think they are the same bolt spacing as big reds.
1987 944 Turbo S "Sophie" - Sold to a Nordsterner to giver her more Brainerd time
1983 944 SP1 "Isabella"
1999 986 Boxster "Gracie" Soon to be SpecBoxster...well in a few years
2007 Chebby 3500 "Clifford"
Nothing sucks more than that moment during an argument when you realize you're wrong