2.4.22 kernel source for RedHat 8?

[Peter Campion-Bye]

Hi,
I need a 2.4.22 kernel in order to run apcupsd (http://www.apcupsd.com)
All the RedHat 8.0 kernels I can find stop at 2.4.20, are there any source
rpms for later kernels anywhere?
Should I just patch the 2.4.20-20.8 source I used to build my current
kernel - if so where are the patches I should use?
I tried building a kernel from the source at www.kernel.org once but
wasn't too successful - can anyone point me to some tips on doing this if
that's the best way forward?
Many thanks for any help,
Peter