I have been planning to do a brake conversion, but with more common parts. The ideal route is Integra rotors, calipers, and brackets, so there is more options available and all parts are easier to find, but 3g Prelude rotors are the same as SE-I rotors and should still be able to be used with Integra parts. Fastbrakes sells an 11" conversion for either setup, but Wilwood sells a 12" setup for the Integra if you want to get serious.
This is the route I need to go with. There is an outfit near me that does laser cut parts and I can get a batch done after I figure out the offset and design. The material thickness worries me a bit, but I need to see how solid the stock Integra setup is.
I need to get my hands on some parts. I need: SE-I rotors, Integra rotors, Integra brackets, Integra calipers. If anyone can supply me the measurements of the first 3 parts I would be very grateful. I need to know rotor offset (face to face, don't care which ones as long as I get the same on both rotors), I will probably have to measure the bracket myself.
I think on the Integra the bracket is integral to the caliper, so on most good remans you get the whole thing, so that makes acquiring parts a little easier. In my case I will need to get the whole rear trailing arm assembly so I can make a measurement to the caliper mount. So the SE-I rotors will be the only thing that I won't have, provided that I even need them, they aren't expensive either. It just started to get hellishly cold, so hopefully there is a decent enough day to go to the parts yard soon.