If it is confirmed whether these PP Brembos are standard STi sized, something like this would be a good replacement.
https://www.oakos.com/CEN-125-47019.htm
or
https://www.oakos.com/CEN-121-47019.htm
Centric blanks in 5x100 STi dimensions for ~100 or 180 a set. They also carry rears.
Edit: this thread indicates that standard STi rotors should be compatible
http://www.ft86club.com/forums/showthread.php?t=122138