I have a set of RSR type S rear calipers with mounting brackets forsale that I was going to use to upgrade my rear disc to 10.2" sized rotors.

These can be paired with 03 Civic SI rear rotors to convert any EM1/GSR/LS rear disc to 10.2" rear discs. This is a bolt on process and is documented on Honda-tech

How To: 10.2in Rear Brake Upgrade on your Honda - Carolina Hondas

80$ Firm

Text 727-412-three one zero nine