I know a bit late to this thread, but if you are seeking to find a registered agent for NRA Group, LLC, which as previously noted does business as "National Recovery Agency," it appears that they use Corporation Trust or "CT" in every state that they are registered to do business in.
A quick search revealed that they do not appear to be licensed in DC or VA, but are licensed in MD.
The registered agent address there is:
THE CORPORATION TRUST INCORPORATED
2405 YORK RD
LUTHERVILL TIMONIUM MD 21093-2264
Their address for Corporation Trust in PA is:
CT Corporation System
600 North Second Street, Suite 401