Need Local Backlink Service (SAFE)

I have done Local SEO and we are ranking in local 3-pack 90% of the time for 80% of our target keyword phrases. I would like some *SAFE* boost for local backlinks. We already have citations in all services (Google Places, Bing Places, Yelp, Yellowpages, Superpages, EVERYTHING). This must be SAFE and NOT SPAMMY! We just need *small* *NATURAL LOOKING* boost in local backlink profile. Please PM me if you have service.