Add on Nav system

I currently have a 7" monitor flushed and molded into the dash of my 00 Civic Si, and using a JVC headunit to play both DVD, MP3 and CD but I was curious to know if there is any way I could add Nav. to what I already have. At least by using the same screen. The only add-on system I know if is pioneer and it seems to only be for Pioneer souch screen systems. I thought abotu a TomTom or garmin unit but they're another(smaller) screen to look at and Won't be as clean of a install. Any suggestions or ideas?

alpine you can get the kit that allows you to use it with any screen. not sure if any of the other manufactures have that option.There are 10 types of people in the world, ones that understand binary and ones that dont.