Slave Leia no longer exists according to Disney. Don't get your hopes up.
(personally, I view her as never having been a slave... she voluntarily stayed there in order to be part of Luke's master plan... and she had a closet-full of slave-wear to choose from and SHE picked the bikini... knowing it would distract the guards... it depends on your point of view.)
Yup I wouldn't expect that we will see slave Leia or the slave girl outfit so much, at least in terms of products for sale since it really isn't politically correct/sexually objectifies women and such. Or at least I think that was the reason back when they had that whole story about a dad freaking out about slave leia when he was showing Return of the Jedi to his daughter.
I suspect that if there were to be a slave leia/huttslayer leia miniature it will have to be from shapeways or a custom miniature.