I have recreated default nasty looking default POI ICON in Polnav Navigation for Windows CE. Some icon come from mapbox and the other is result of my own. The  icon format are .PNG 40x40px,  so you can recreate yourself if it doesnt fit you.

Here some screenshot, you can find download link on the bottom of this post, just extract to folder "Image" in Storage Card\Polnav\Image.




Source:
Mapbox Website : https://www.mapbox.com/
Download Polnav Custom POI Icon