How to install perl-readonly module?

Issue

• How to install perl-readonly module which is required for nagios?
• Got a warning when trying to install a script which requires readonly module.
• when I try to install the perl readonly package, there's no package available for this.

# perl Makefile.PL INSTALLSCRIPT=/usr/lib64/nagios/plugins
Warning: prerequisite Readonly 0 not found.
Writing Makefile for check_diskio

# yum install perl-Readonly*
Loaded plugins: product-id, refresh-packagekit, rhnplugin, subscription-manager

This system is receiving updates from RHN Classic or RHN Satellite.
Setting up Install Process
adobe-linux-x86_64                                       |  951 B     00:00
epel/metalink                                            | 3.3 kB     00:00
rhel-x86_64-server-6                                     | 1.8 kB     00:00
No package perl-Readonly* available.
Error: Nothing to do