where are source rpms

I have a CentOS 3 server that I need to build new Pg 8.3 client libraries for.
There aren't any pre-built RPMs so I'm looking to build the rpm from source.

But where are the source RPMs? I can't find them in the postgresql.org downloads area.

I found this project:
http://pgfoundry.org/projects/pgrpm/

But I don't see any actual source rpms provided there.

I found this page about building the rpms but there's no links and the PDF is giving "permission denied":

http://wiki.postgresql.org/wiki/RPM_Packaging

Any pointers?

Thanks.

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