[CentOS] Amavis on Centosl help

I'm moving from Ubuntu to CentOS 7

Previously, on Ubuntu, installing amavisd would lead to
etc/amavis/conf.d that contained:
 01-debian
 05-domain_id
 05-node_id
 15-av_scanners
 15-content_filter_mode
 20-debian_defaults
 21-ubuntu_defaults
 25-amavis_helpers
 30-template_localization
 40-policy_banks
 50-user

However installing amavisd on centos leads to a spaghetti config file
(i.e. /etc/amavisd/amavisd.conf and nothing else)

For obvious reasons I want to avoid spaghetti config, not only is it
poor practice, but also nigh on impossible to maintain properly
without breaking stuff.

Assuming it is possible, how would I go about changing the Centos
"dump" based config into a more sensible one where local site
customisations are clearly deliniated ?