How about trying to download what there is first and try to install it?

All the rpm-format packages there are already compiled for AIX (even labeled "Binary RPM"!) and you do not need to compile anything. While i do not know your company at all i rather doubt that you need to state a business case to install industry-standard software offered from the very vendor of the OS you are already using.

The rpm (Redhat Package Manager) package contains simply the package manager and it is in no way necessary to compile anything, it is just a prerequisite software to install rpm-format packages because AIX uses its own package manager "installp", which uses packages in a different (bff-) format.

I hope this helps.

bakunin