For the MDI,
Golf 3-door - Not available.
Golf 5-door & wagon Trendline - Not available.
Golf 5-door & wagon Comfortline - Not standard, $1000 with multimedia package.
Golf 5-door & wagon Highline - Standard.
Golf GTI - Not standard, $1999 with technology package.
At the moment, It does not seem that VWoC is selling the MDI as a standalone option. A retrofit for the part is about US$400 though online sources.