As stated previously, Modular components are individual items and component parts in themselves and are not required to be registered on a firearms certificate.
Laws are not breached until a complete and unlicensed moderator is fitted to a licensed firearm.
Any unlicensed moderator that is intended to be used on licensed firearm needs to be registered and put on holders certificate.
Those are basically the rules per se, what the moderator manufacturer or other individuals interpret the law as being is beyond me.
My Initial question was, "Are Wildcat moderator Spares Available online and without ordering through RFD" ... it turns out that yes they are if you search hard enough and find the common sense approach that cuts through the ridiculousness of misinterpretation that surrounds the issue.