This is what the part looks like before it's installed from PFYC.
The cat is on the left in the pic and you can either buy a replacement from PFYC or you can have an exhaust shop make one.They should have O2 bungs for the sensor or you can buy the bung from either summit or jegs.
http://www.pfyc.com/store/merchant.m...ory_Code=GPEXH
O2 sensor bung
http://www.jegs.com/cgi-bin/ncommerc...89&prmenbr=361