They're on her Wiki page
You go to Image gallery and scrowl down to characters
Sora is the last in the list
Hen if you click on the image under it there should be a link called (Original File) you click on the link and a HQ version of the transparent image should open up
Comments (1)
Or simply click on these links below (still on the Vocaloid Wiki).
Haruno Sora (Cool) : https://vocaloid.wikia.com/wiki/File:Haruno_Sora_Cool.png?useskin=oasis
Haruno Sora (Natural) : https://vocaloid.wikia.com/wiki/File:Haruno_Sora_Natural.png?useskin=oasis
Haruno Sora (VOICEROID2) : https://vocaloid.wikia.com/wiki/File:Haruno_Sora_Natural.png?useskin=oasis
Yeah I'm a wiki member after all, this stuff is easy to use. No need for such complex instructions.