Hi Andy,
try to use the BC sets. I think there is the initial rule set available and you can download it.Maybe you have to convert it to the right format. After that you can upload the ruleset for your requirements. Do not activate the BC set for this purpose, otherwise you will maybe cause confusion in the system.
And please keep in mind, that some adjustments are available for the rule set in some SAP notes.
Much success.
Best regards,
Dirk