Hi Mike,
A. Duplicate your sequence, use Timecode Generator from Video/Video Filter over your edited sequence and then export as QT Movie (low res).
B. More simple workaround would be export your audio clips to a DV tape, so that the transcription company will get the sequence TC.
Regards
Ashique Ahmed Khair
Media Consultant and
FCP Editor
Call/SMS +8801711116952
Email ashique@consultant.com