I am not sure if someone has mentioned this suggestion before, but have you thought about doing some bluescreen shots with Studio Scaled models to help create some of the FX shots you are planning to do?

I know there are some really talented people who have already built and painted a lot of SW models that are almost identical to the originals.

Maybe you could put out a feeler if there is anyone with such-and-such model, which they would be whiling to allow you to borrow for your shots. In return you can get a nice FX shot, and they can say their model is 'screen used' in Star Wars Revisited. Just a thought.