Van was one of the ones I had thought would work as well fro Anakin, though I was thinking of the movie Van. I wish I'd watched the spot recently to remember what all it had in it. Were this ep. 1, I'd almost suggest Shu from Now and Then, Here and There, but Shu might be a bit young for Anakin (then again, we're using Utena for Obi-Wan, so I think being the wrong age shouldn't be a problem). You could also probably use the main character from Gatekeepers, Shun. He's got a decent amount of swordplay, and you could use his hotrod car for the speeder. If you want to continue the theme of gender-swapping the main characters, use Motoko (though good luck on the speeder...)
For Yoda, Master Roshi was another one that we'd thought of, as was Krillin (there just aren't a whole lot of short characters that come to mind that kick ass...). Though I won't even begin to say how wrong this would be, there's also Happosai... :shudder: