Road on Low-poly Terrain??

Hello, I have been testing out different Unity assets and plugins, trying to find the best/ easiest way to neatly conform a road to a Low-Poly Terrain. I've tried "EasyRoads3D" & it works great, the issue is that it only works on "Unity Terrain" and not on a "Mesh". (Then, I export the "High-Poly Unity Terrain" to low poly with "MTE mesh terrain editor" but then the track is no longer conformed.)
I also tried making a terrain in "Sketchup" & using the "InstantRoad" Plugin. This works great as well, but I have issues with texturing and lighting it after it's exported to Unity.

Basically I'm looking for a plugin that allows the same functionality of "EasyRoads3D", except I want it to work with any Mesh, not just Unity Terrain. Any suggestions? Thanks in Advance!