Hi, 
I share this new addon of the New Horizons space probe that flew by Pluto, Charon, and (486958) Arrokoth / 2014MU69 / Ultima Thule.  newhorizons.pak

Download and copy to your addons folder.

Thanks!

You can also get it through Steam Workshop now. 

Updated the link here and the workshop project. I updated the textures of the gold foil to make it more shiny/reflective. It also now lies in  the Real pack which already contains other spacecrafts instead of Probes.