postgres rpm 403 forbidden

Hi:

Assuming this is the right channel, I would like to get advice on
obtaining the postgres92 rpm on RHEL5 for installation.

Following the blog on https://people.planetpostgresql.org/devrim/, I
visited the https://yum.postgresql.org/repopackages.php#pg92, found the
rpm:
https://download.postgresql.org/pub/repos/yum/9.2/redhat/rhel-5-x86_64/pgdg-redhat92-9.2-9.noarch.rpm,
downloaded it, then added it on RHEL5 OS via command:

sudo rpm -ivh pgdg-redhat92-9.2-9.noarch.rpm
Preparing... ###########################################
[100%]
1:pgdg-redhat92 ########################################### [100%]

But then, when check repolist via "yum repolist" I got the following error
message:

https://download.postgresql.org/pub/repos/yum/9.2/redhat/rhel-2012.03-x86_64/repodata/repomd.xml:
[Errno 14] PYCURL ERROR 22 - "The requested URL returned error: 403
Forbidden"
Retrying current mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository:
pgdg92. Please verify its path and try again

I understand this is a much deprecated EOL version, but still appreciate
for any advice. Can I find any source code and manually compile on RHEL5?

Thank you!
Xiaokun