My white diesel HSE will arrive in November. The only detail i dislike are the black side-, front- and back sills. Are there third-party component suppliers for the "Autobiography" style sills? Nothing Kahn-like, just similar to the original.

Simple, you have to get them painted, do a search on here for colour coding. In Spain - 2018 F Pace - Frightened away from the Sports due to crank failures
Gone - A couple of RRS, A couple of Disco's. However thinking of another Sport.

Thanks SRE! I expected the sills to be of different material as stone chips would quickly eat themselves through the paint to the black plastic. Hence, I thought the sills would be of all-white plastic, but I may be wrong.

Anyone else have ideas? 2013 RRS TDV6 HSE, fuji/almond - First in Finland to order the new model
2007 Freelander i6 HSE, stornoway/black - First in Finland to order the new model

I don't like black plastic look on the RRS either. I think that getting it painted is the best option, but it may be costly. Arrived: MY16 A/B SDV6 in Aruba, Ivory interior, piano black trim, black panoramic roof, spare wheel, blind spot monitoring, mudlaps and more...

Gone but not forgotten:
2014 RRS2 SDV6 HSE in Loire Blue
2011 Freelander 2 SD4 HSE in Santorini Black

My concern is that painting it will with time reveal the black plastic underneath. I'd rather keep it black than risk having it look like a Dalmatian.  2013 RRS TDV6 HSE, fuji/almond - First in Finland to order the new model
2007 Freelander i6 HSE, stornoway/black - First in Finland to order the new model

Maybe paint and fit with a 3M coating... 2022 P440e AB

How about just getting the relevant parts wrapped in white. At least you can then revert them to standard if you feel like it. Also the wrap is pretty tough so shouldn't suffer from stones too badly. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Nothing wrong with painting, Land Rover themselves produce cars with painted plastic panels, Freelanders had plastic front wings, and the some of the Sports left with painted plastic trim. In Spain - 2018 F Pace - Frightened away from the Sports due to crank failures
Gone - A couple of RRS, A couple of Disco's. However thinking of another Sport.