If you’d like, I can:
A "new" base 2018 version is actually v2018.0 . To reach the "2018.11" level: autocad civil 3d 201811 full version new
Getting the of this specific build requires careful sourcing. Because Autodesk has moved to subscription-only models, physical media or enterprise image servers are the most common sources. If you’d like, I can: A "new" base