On the thread where you first posted of this, the advice to call the NRA is good, but does look like they may require you to be a member. If you're not, I think it's still worth calling and relating why you want a referral:
You could also try contacting the gun club I belong to, dprc.org. I don't have it handy but thought one recent newsletter had some lawyer listings.
Last, I've used the NC lawyer referral service before - not for an OC incident but it's an inexpensive 30 min. consultation. http://www.ncbar.org/public/lrs/public.aspx