All you have to do is log into your CS account, click on your download (or boxed version) of the C130 and you will get the option of downloading the paint kit for it.

Good luck with this kit though, it is hap hazard and difficult to work with.  Very little in it is clear cut, unlike most paint kits.  Also you will find that there is a LOAD ERROR with the C130_1_T.psd/psp which makes it kind of hard to paint the plane after you have figured the kit out.  The C130_1_T.psd/psp file is the main body of the aircraft :(