basically i have blown second gear up in my gear box have atb diff in it so am gonna rebuild it now i have taken it apart and need to replace second gear cog and the late shaft anyone know how much these two parts will cost me and where to get them.I can get an xr3i box for fifty quid and was gonna buy it and take the two parts i need out of that as it is a cheap option but dont know if it will fit im pretty shore it will as all the bearings ect in my box are fine anyone done this or know if it can be done any help appreciated thanks