Maybe they aren't doing the bikini because they're not Lucasfilm-licensed, and have to make significant alterations to the costumes or get sued?
That's my assumption, too. Bet that slave bikini is worth BIG bucks, and not to be trifled with.
In a way, I think what you and Temis talk about is what bothers me the most about it. I'm actually less bothered by the rape in Irreversible than I am in the sexual dangers women are placed in more kid-friendly fare.
It's just part of the emotional autism of the entire OT, and I accept it as the
Star Wars "thing." I don't see it as any weirder than, say, the way Luke and Leia's families are murdered in ANH - and Leia's planet is blown up right in front of her - yet neither of them seem to be in catatonic shock or enveloped by murderous rage like a normal person would be. They just bounce along with the whole adventure like nothing happened.
Consider how bizarre it is that Leia's planet has been destroyed, she's been tortured, and when a stormtrooper opens the cell door, certainly she has to be expecting to be taken to her execution. Instead of being a spitting, defiant demon like we'd expect, she just makes a breezy quip about the guy's height. Okay, maybe she's planned the quip as a show of defiance, yet that isn't the way it comes off at all. There's no sense of raging emotions behind it, and not a hair on her head is mussed. I'm sure the Organas raised her to be tough and self-possessed, but that's just too much to believe.
Or, when Luke's landspeeder rolls into Mos Eisely, why doesn't Obi-Wan have to physically restrain Luke from trying to murder the first stormtrooper he sees with his bare hands, after having seen the people who raised him from infancy turned into BBQ? Why doesn't Luke rage against against Obi-Wan's ghost for allowing him to fall in love with his own sister? Why don't either of them act at all freaked out upon learning the truth?
In that context, if Leia had been raped by a giant slug, would we have expected her to have any sort of reaction at all? These characters are like emotional Wil E. Coyotes, falling off thousand-foot cliffs and snapping back into shape, none the worse for it. Sure, maybe someone should re-do the OT and let the actors have a bit more leeway to "make it real," but only after we've re-done the PT, where emotional autism is only the tip of the iceberg.