Why don't you use copy to Profile and then use Scale and Move to get it to the correct Station and Elevation and scale - then you can add it to an Alignment as a Profile and then use the new HAL / VAL to create your wall?
I get what you are trying to do I think
You have a line for the wall alignment
You have a Profile for the Wall as a 2D CAD drawing with Grids (Station and Elevation)
You want to turn the 2D line for the Wall into a 3D line for the wall through this process
This is a very similar process as we use for converting Sections to Stored Sections today right but just for profiles.
Alan