jumbopisa

so finally got money to buy my z now 3rd grinds big time i used this as barganing and got car pretty cheap so im thinking new gearbox i have 04 model so from what ive gatherd i need a de and prefably the cd09 is this correct? and does anyone have one for sale or know a man that does? and finally what kind of price do they tend to go for? thanks for any help guys.