Inner Circle
I have not been able to determine any further definite names.
In regards to the idea of drawing them out, I feel we need to do this with minimal risk to ourselves, specifically minimal risk of them positively identifying us. True, we have our masks and cloaks but not taking undue risks at this point would be wise.
I believe the easiest methods would be simply to let it leak that we are meeting somewhere and see who turns up. We have positively identified Aberforth Dumbledore as a potential vigilante and he owns that disgusting pub in Hogsmeade. Perhaps if two of our younger members were to go there and find a way to leak the information to him without appearing to, we may have an effective set up?
It would provide an added bonus of being a test for those two youngsters to see how well they do.