Camber Kit Needed on Lowered Z?

[BlackZMamba]

Ok guys I have a 2013 Z. I purchased the base model with the 18" wheels. It is now currently lowered on recently installed 19" rims. The Nissan Dealership aligned it for me, however, there is still a little bit of negative camber on my passenger's rear tire. I can see the outside part of the tire not sitting perpendicular to the ground. Will I need the camber kit installed? I have read that SPC or SPL are both good choices. For those of you that purchased it already, can you recommend certain vendors or post some links?

Here she is:




Thanks in advance for the help!