I believe unless there is something that will work through the wireless samsung screen sharing protocol you will likely need to try a powered USB hub and a USB touch screen like a MiMo:
You will also need to use a USB adapter cable to give your phone a USB port such as this:
This will let you hook the USB hub to your phone. Your phone can not power a device such as the MiMo so you need the powered hub to accomplish this.
The store here has a decent one for in car use:
But you can use a cheap generic one to make sure you can get it to work with your phone. There is no guarentee that you can use an external screen like this with your phone and Samsung won't tell you but the mimo is cheap enough to give it a try and see what happens. If it works then great. The only issue you MAY have is your USB port is used to also power your phone which will not be available for charging with this setup. You may also want to look into a wireless charger for your phone assuming this setup works for you to allow your phone to remain fully charged.
It SHOULD work as long as your phone can see the MiMo as an external screen and go from there.
Another option you may have if this does not work...
Get the Samsung Smart Dock Multi Media hub. This will allow you to have an HDMI output, audio out, 2 USB ports. You could then use the HDMI port and hook that to a monitor and the touch screen USB interface to one of the USB ports.
Using a dock in a vehicle might be difficult but you could atleast see if this works and then look for a similar option that would work in your vehicle.