>>10847081>>10854611Taobao+middleman like Wegobuy
https://item.taobao.com/item.htm?id=728597371784>>10843569>>10842503Nicee you can find on Aliexpress for about 150$, but I would recommend you get Mooka instead. She has an improved transformation, more accessories and goes for about 90$ there.
As for the upgrade kit, it's actually pretty bad. Plastic is really low quality and the fit is terrible. It comes with a lot of boobs but unless you cut the tabs and replace them with magnets you will have to stick to one. Expect to shear the plastic when attaching the pasties. Not only does it require a ton of force, you won't be able to remove them for painting, I could have made them a lot shinier if it was easier to assemble. The screws holes for the chest need to be drilled yourself, and I ended up stripping Mookas while putting her torso together so she'll have this set permanently.