Legacy Packages in current RHEL 7.5

Hello Community,

i am new to RHEL and apologize in advance for my lack of knowledge of the ecosystem.

is it possible or at all supported to use RPMs of earlier Versions of RHEL?

i.e. for a reimplementation i need apache/httpd 2.2 - from https://access.redhat.com/solutions/445713 i can see it is available in RHEL 5, which itself is already in ELP
https://access.redhat.com/support/policy/updates/errata/

is there a different generic best practice for legacy-package-requirements without also forcing legacy RHEL i am missing?

Cheers,
David