It also would help to know if you are looking for a seamless body or if you don't mind one with visible joints. If you are ok with visible joints, then you can probably paint an all-plastic body to be pure white. If you want a seamless body, then it might be more difficult, unless you miraculously manage to find a loose Tbleague Lady Death body parted out [they are getting pretty rare nowadays]. Otherwise, you can try the regular pale coloured seamless bodies, but both the pale tbleague and the 'white' Jiaou doll bodies still have some pink tones to them.
If you don't mind looking further afield to doll bodies, I believe Obitsu bodies do come in a very pale/white colour.