What is source is shipping with Rev C5?

Where can I find the source for the OS shipping with Rev C5? I need to
recompile x-loader and uBoot because of a hardware problem. My GPIO
pins to set the board revision are not correct so I need to force x-
loader and uBoot to identify the board as Rev C5.

Bump...

I'm still lost. I see mentions of Rev C5 requiring different uBoot
than C4 but I can't locate the source for C5. Can anyone point me to
it?

Following the instructions at http://www.angstrom-distribution.org/building-angstrom would be a good start

Koen,

I went through that tutorial and was able to build Angstrom. However,
that did not get me the Rev C5 uBoot source code as far as I can tell.

Koen,

I went through that tutorial and was able to build Angstrom. However,
that did not get me the Rev C5 uBoot source code as far as I can tell.

Try 'bitbake u-boot -c patch -f'