The 2000 SE VHS and VCD has a EP II trailer. Not sure if it is a making of at all.
You will also need info on the theatrical, digital and DVD releases of the film. A good copy of the theatrical bootleg on DVD would be worth having a copy of for this.
Do not forget the IMAX release either.
I did record the UK Network Premier of Clones which may or may not be of use to you (if I can find it).
As to the BTS content of any of these, I am not sure........