I have the same questions Doug, not sure.
Does training in a complex or TAA, with a flight instructor, need to be logged specifically as training towards a commercial?
Per 61.127:
"flight training ... on the areas of operation of this section that apply to the aircraft category and class rating sought."
As for timing of the training, wouldn't your 9 hours ten years ago still count?
Perhaps your only additional training hour(s) needed is for endorsement to take the Comm practical exam,
which is time limited -
FAR 61.39 (a)(6)(i)
"received and logged training time
within 2 calendar months preceding the month of application in preparation for the practical test."
Might consider:
-one hour of training in complex (or TAA), logged specifically in area of operation for rating sought. That gives ten hours logged training for commercial, in a TAA or complex aircraft.
Then, since a TAA or complex aircraft is NOT required for the practical exam, take training
in the aircraft you'll use for the practical test, get endorsement, and take practical test within two months.
Wouldn't that work, thoughts?