[CentOS] Source for Kernel

OK, perhaps I wasnt clear in my previous posting.
I am looking for either a SRPM for the CentOS 5.2 centos.plus kernel,
or more likely, a diff from the kernel at kernel.org.

I was pointed to the wiki, which MENTIONED a Source RPM, but didnt
point to anywhere to find these for CentOS.  All Ive been able to
find are ISO's .

I really dont need a bunch of tools that will complicate the problem,
a simple diff is what Im looking for,- its got to be out there somewhere.


-- 
                                        Reg.Clemens
                                        reg at dwf.com