[BB Benz]

Because these are not mercedes benz, they are only Smart cars, and yes, they don't care, apparently. For most dealers they are looked at as a losing proposition, kinda like a gnat.
Most dealers don't have a Wrumbarger as a salesman nor do they know how to hire one either. And that is why we won't see the forfour in the US.
You can order your panels from www.smartpartsonline.com be sure to order the necessary clips to go with them. Most any good body shop should be able to put them on properly for you. You can do them yourself, to if you like with the guidance of instructions, on this site somewhere, or definitely on www.evilution.com .

 

[BB Benz]

Anyone else care to chime in with side skirt installation instructions?

 

[BB Benz]

The clips are most important to have when taking off the skirts, paneling side sills, or what ever you want to call them. Clips are frequently broken in the removal process. If they are not replaced when re-installing the side sill panels, the sill panels will come off at the slightest provocation.
A full set of undamaged clips is of the highest priority. It is not a bad idea to have some spare clips if you are attempting sill panel installation the first time.

 

[BB Benz]

I would recommend DIY, so you don't experience the vexation of your spirit from dealing with a less than gracious dealership should you have one of those, and the quality control of DIY lets you know if it was done correctly now and in the future.