There isn't one.
Everything that resto shops do IS covered at tafe during the Panel beaters course. Apprecntices just rarely manage to get into shops that do resto work.
Resto is not a seperate trade...
You can do a night course in resto at tafe but it is only a cert 2 course, YOU DO NOT LEAVE THIS COURSE AS A QUALIFIED ANYTHING.
BUT it is a damn good insight into panel beating, and it covers most of the stuff you want to do.
If you want to work as a panel beater doing resto, the apprenticeship you take is PANEL BEATING. The Qualification/Title/Trade/Piece of paper with your name on it is PANEL BEATING.
Sorry if I miss understood what you were asking before.
Does that clear that up?
The skills that you want to attain (hand forming, led whipping, panel fab) are allllllllllllllllllllllll covered in the Panel Beating course.
Sheeties do cover a lot of the same stuff, but there is a lot that they don't cover.
All good

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<edit> Just to be clear,,, you learn that stuff during the TAFE component of the Panel Beating apprenticeship... you just might not be learning it at work.... make sense?