[Personally I used my Galaxy S3 android set with SYGIC and it works good. I use mobile holder and car charger attached to avoid battery loss.]
I purchased the car last year and the rocknmars set came with it. you can get it install it at various location as rocknmars have many dealers all over the karachi. I inquired for the rocknmars navigation supported set which cost was 12k around on year back from following.
Sound Injection
Prince Plaza, Shop # 7, Near Aisha Manzil, Karachi
021-36311581
0300-2415178
You can fin all retailers details here.
Retailers | Rock Mars