I once saw a shop offering such a bodysuit, although it was supposed to be convincing even when basically nude (for MtF transsexuals), thats a bit over the top for crossplaying. The price was also a bit steep around 2000€ (two thousand, no typo), so i really doubt its what youre looking for.
Im not aware of any guides though, and since i have neither the experience nor any idea what youre expecting to crossplay as (cleavage, crotch, etc.) i cant really help you in any way.
Female Natsuru Senou (Kämpfer) at Gamescom 2014
Hatsune Miku (Vocaloid)
Char B1 (Its a TANK, its not from an anime, unless you mean Girls und Panzer)
Kaito Kid (Detective Conan/Case Closed and Magic Kaito)