I have a full set of Calipers, Brackets, Master, Booster and Prop valve for a 2003, the Sport brakes, a little larger than the '94-'01 1.8 brakes. They're still in the boxes from the Parts Group. NASA split the PT/TT classing for '99-00 and '01-05 Miata, so they're no longer a 'No-Points' upgrade for my '99. I'm glad a procrastinated putting them on until the 2014 rules came out.
You'll need rotors ($20-25 from NAPA) and pads. I get mine at Track Dog.
Do read Keith Tanner's posts on Miata.net about mixing Calipers/Master/Prop Valves between various versions of Miata brakes. Overall the recommendation was to use a matching set for best performance, although non-matching sets seem to work OK.
$250, picked up in Flower Mound. PM me for contact info.