Q: MPEG2 HD for Broadcast?

I need to output HD commercials to a TV station using their requirements:

Video:

      I assume transport (not specified by the station)

       4:2:2@HL

      16x9 (1920x1080)

      45 Mbps

  Audio:

      MPEG or PCM audio

      2 channels

      384 Kbps

      48KHz

I've been using Episode, because it's easy to set all this up, but I thought I'd see if it could be done in Compressor.  So far, no joy.  Bit rate in CBR is limited to 40, and I can't tweak the bit rate on the audio at all.  The station might take it at 40 Mbps, but anytime they refuse a spot they alert my client, and that's bad mojo - permanent record, black marks, and all that. 

Any suggestions?