Question regarding bridging a Crown XLS

Okay, I'm sure anyone who has experience with these amps knows about the brilliant engineering design that was concocted to make them bridgable (I was being sarcastic when I said "brilliant" ).

Obviously, I need Y cable with two male XRL end, one end with reversed polarity. I also need the single end going to my preamp to be a 1/4. I'm not an electrician, so I have no idea how to make one of these (and I don't want to cause any damage by doing so). I was wondering if there was anywhere I could order these cables pre-made.

Y cable
2 XLR ends (one with reversed polarity)
1 1/4 inch end

I greatly appreciate any information anyone has.