It would depend on what you mean by the phrase "stand alone CD burner."
If you mean an external CD writer drive for a computer, I think the answer would be no since the Fostex would not have the drivers to control the CD writer.
If you mean a CD recorder (like an audio tape deck on recording to CDs), I don't believe they come with a USB connection. They do however have a connection labeled S/PDIF (for Sony/Phillips Digital InterFace). I'm not familiar with the MR8HD, but the VF-80 has the S/PDIF connection and I have used it for mastering from the VF-80 to a Pioneer CD-Recorder. If the Fostex unit you are using has the S/PDIF connection, you can use this with a CD-Recorder.
Hope this helps.