You need the potts mod topcap, bolt and starnut for 1 1/8" period. You need an 80's ish BMX stem or potts mod bolt/wedge (unless your wedge is the same angle and thread) for 1" period. Any other advice is horse puckey. Any of which should be available through Ebay or Danscomp.com or albes.com.
A gyro CAN be used for rear brakes with minor modification.
To use either potts mod setup you will need to invert the cable attatchment points on the arms of your brake.
A 650c wheel may be needed to clear the frame...it will take some trial and error work but it isn't hard.