Help: Hardwire Garmin Nuvi using female cigarette adapter

I need a bit of help here and I am sure this has been covered but I cannot find the answer.  I am looking to "hardwire" my Garmin in my 2009 Avalanche.  I want to keep the cigarette adapter since the traffic is built into the cord.  I wanted to just add a female cigarette adapter to the fuse box underneath the drivers side, but I am nervous about adding circuits down there.  I thought at one point I saw a pre-made female cigarette adapter that would plug into an empy space in the drivers side fuse box, but I cannot find it again.  Does anyone know of a right up to add a female cigarette adapter to the drivers side fuse box that would also have RAP?